Page 3 - Best Knee replacement doctors: TOP 104 doctors

Dr. Eyup Bakmaz is an experienced orthopedic surgeon in Istanbul. He specializes in sports medicine, knee replacement, and hip arthroscopy. He has over 20 years of clinical experience at Gayrettepe Florence Nightingale Hospital. Dr. Bakmaz performs both minimally invasive and traditional orthopedic procedures.

He is known for his skill in treating orthopedic trauma and sports injuries. He also focuses on advanced rehabilitation. Dr. Bakmaz is a certified specialist from Istanbul University Cerrahpaşa Faculty of Medicine. He is committed to evidence-based and personalized patient care. His patients report high satisfaction and strong surgical results.

surgeon. Dr. Serdar Karaman graduated from İnönü University Faculty of Medicine. Subsequently, he completed his specialist training in Orthopedics and Traumatology at İnönü University. His previous experiences include Elbistan State Hospital and İnönü University. 

Areas of particular interest: Hand surgery, sports surgery, arthroplasty, cartilage injuries, pediatric orthopedics, foot and ankle surgery, arthroscopic surgeries, lengthening surgeries and pelvic fractures.



Scientific Publications

Articles Published in International Refereed Journals: 1. Which is more dangerous, earthquake, or the panic? Evaluation of the 24 January 2020 Elazig/Türkiye earthquake related musculoskeletal injuries. E Ergen, O Kaya, Ö Yılmaz, HU Özdeş, ÖC Batur, S Karaman, İ Güzel, .Ulus Travma Emergency Surgery Derg 28 (9), 1335-1339 2. The Clinical Results of Tendon Transfers in Patients with Ulnar Palsy. S Karaman, S Ekrem, K Ertem. Journal of Medical Case Reports and Reviews 5 (6), 1144- 1152 3. Clinical results of endoprosthetic reconstructions in metastatic and primary bone tumors. R Sevimli, S Karaman. Medicine Science 11 (1), 199-203 4. A Case of Glomus Tumor in an Unusual Localization of Hand. S Ekrem, S Karaman, K Ertem, H Köse. Clin Case Rep Int. 2020; 4 1198 5. Spontaneous extensor pollicis longus (EPL) tendon rupture after ironing. S Karaman, M Köroğlu, ZM Özdemir, K Ertem. Oral Presentations Presented at Annals of Clinical and Analytical Medicine 2020 National and International Congresses: 1. Medium and Long-Term Results of Patients to whom We Performed Microfracture for Knee Joint Cartilage Damage. Karaman S, Ergen E, Aslantürk O, Kılınç Ö. 30th National Turkish Orthopedics and Traumatology Congress, Antalya, Turkey, 9-14 November 2021. 2. Medium and Short-Term Results in Our Patients Treated with Reconstruction with Endoprosthesis After Resection for Malignant Bone Tumors. Sevimli R., Karaman S. Bone Joint 2021 Online Congress, Ankara, Turkey, 1 - 04 April 2021, p.82 3. Mid-Term Clinical Results of Surgical Treatment of Thumb Metacarpophalangeal Joint and Collateral Ligament Injuries. Karaman S., Ekrem S., Ertem K. 17th National Turkish Hand and Upper Extremity Surgery Congress, Turkey, 16 - 20 November 2020 4. Mid-Term Results of Surgical Treatment of Thumb Metacarpophalangeal Joint Collateral Ligament Injuries. Karaman S., Ekrem S., Ertem K., Aslantürk O. 17th National Turkish Hand and Upper Extremity Surgery Congress (ONLINE), Turkey, 16 - 20 November 2020 5. Evaluation of Mid-Term Functional Results of Our Patients Who Had Arthroscopic Rotator Cuff Repair. Kilinç Ö., Ertem K., Ergen E., Karaman S. 17th National Turkish Hand and Upper Extremity Surgery Congress, Turkey, 16 - 20 November 2020 6. Retrospective Examination of Patients Treated Surgically Due to Carpal Bone Cyst. Karaman S., Ekrem S., Ertem K. 29th National Turkish Orthopedics and Traumatology Congress, Antalya, Turkey, 22 - 27 October 2019, vol.53, p.47 7. Streptococus Pneumonia in the Proximal Humerus in a Baby Presenting with Brachial Plexus Disorder Clinic Case Report of Osteomyelitis Due to Disease. Karaman S., Özdeş H. U., Gündüz E. 29th National Turkish Orthopedics and Traumatology Congress, Antalya, Turkey, 22 - 27 October 2019, vol.53, pp.152 8. Retrospective Examination of Mid-Term Results of Surgical Treatment of ThumbMmetacarpophalangeal JointCollateral Ligament Injuries. Karaman S., Ekrem S., Ertem K. 29th National Turkish Orthopedics and Traumatology Congress, Antalya, Turkey, 22 - 27 October 2019, vol.53, pp.139-140 9. Retrospective Examination of Patients Who Had Tendon Transfers Due to Ulnar Nerve Paralysis. Karaman S., Ekrem S., Ertem K. 29th National Turkish Orthopedics and Traumatology Congress, Antalya, Turkey, 22 - 27 October 2019, vol.53, p.139 10. Case Report of Radial Nerve Interference Between the Fracture Line in Supracondylar Humerus Fracture . Karaman S., Sağir A., Çoban İ., Sevimli R. 29th National Turkish Orthopedics and Traumatology Congress, Antalya, Turkey, 22 - 27 October 2019, vol.53, pp.147-148 11. Should We Have A Controlling Hip X-Ray In A Child Whom His Hip Ultrasonography Reported As Normal Previously? Ceylan M. F., Karaman S., Karakaplan M. 17th International Eastern Mediterranean Family Medicine Congress, Adana, Turkey 10 - 13 May 2018 12. Medico-Legal Examination Of Patients With Developmental Dysplasia Of Hip Treated Surgically Due To Late Diagnosis. Ceylan M. F., Karakaplan M., Karaman S. 17. 17th International Eastern Mediterranean Family Medicine Congress, Adana, Turkey, 10 - 13 May 2018 13. Does The Implemented "Developmental Dysplasia Early Screening Program" Reduced The Need For Surgical Treatment? Ceylan M. F., Karakaplan M., Karaman S., Kaya R. 17th international eastern mediterranean family medicine congress, Adana, Turkey, 10 - 13 May 2018 14. Shoulder Septic Arthritis Occurring In Newborn With Brachial Plexus Paralysis Clinic; Case Report Presentation. Yıldırım E, Karaman S. 16th National Congress of the Turkish Society for Surgery of the Hand and Upper Extremity and 5th National Congress of the Hand Therapist Society Abstract Supplement. May 6-9 2018, Pamukkale, Denizli, Turkey. Hand Microsurg 2018;7: Suppl1. P.47

Dr. Haldun Orhun is an orthopedic surgeon and traumatologist with experience since 2011. He graduated from the Medical School of Ankara University in 1985 with a degree in general medicine. He is a member of the Turkish Medical Association, the Istanbul Chamber of Commerce and the International Society of Arthroscopy, Knee Surgery & Orthopedic Sports Medicine. He specializes in joint replacements, sports injuries and spine traumas, and serves both children and adults.

1997 - 2002 Istanbul University Cerrahpaşa Faculty of Medicine, Department of Orthopedics and Traumatology

1990 - 1996 Istanbul University Cerrahpasa Faculty of Medicine

Articles he wrote and contributed to;

Clinical efficacy of peritendinous platelet-rich plasma injection in the treatment of tendinopathies: A retrospective study Aybars Kıvrak* (a), Mehmet Can Ünlü (a), Esref Terzi (a), Olgar Birsel (b), Doruk Akgun (c), Yusuf Pirincci (d), Gokhan Kaynak(a), Isik Akgun (e) Medium and long-term effects of acetabular roof ring and Burch-Schneider anti-protusio cages in acetabular revisions in patients with acetabular bone deficiency Correspondence: Yusuf Pirinççi , Muhammed Taha Demir, Mumammet Salih, Fahri Erdoğan, Nejat Güney

Dimensional variables of the proximal femur in developmental adult hip dysplasia suggest that a tapered, rectangular, press-fit design may be an optimal choice for patients with Crowe type IV hips

Specialties

Limb Lenghtening 

Sports Surgery

Meniscus Tears

Anterior Cruciate Ligament Tears

Knee Prosthesis

Hip Prosthesis

Shoulder Prosthesis

Shoulder Slap Repair

Height Extension

Tumor Surgery

Foot Surgery( Hallux Valgus)

Diabetic Foot

Bone Infections (Osteomyelitis)

Studies, qualifications

• 1978 – 1984 – Semmelweis University of Medicine, Faculty of Medicine, Budapest
• 1989 – Orthopedic examination
• 1994 – Traumatology examination

Professional experience

• 1984 – 1987 – Budapest, Szent János Hospital, Orthopedic Trauma Department
• 1992 – 1993 – St. Pölten, Landeskrankenhaus Unfallchirurgie ( Prim. Dr. H. Hackstock )
• 1987 – – Metropolitan Municipality Uzsoki Street Hospital, Orthopedic Trauma Department

Fields of expertise, specializations

musculoskeletal surgery, endoprosthetics, sports surgery, arthroscopy

Professional, science activity

Education
• Theoretical and practical training of doctors at the Semmelweis University of Medicine, Budapest – from 1987 (in Hungarian, German)
• Teaching at postgraduate courses at the Haynal Imre Medical Education University and Semmelweis University, Budapest – from 2000
• Instructional courses and workshops of the Hungarian Arthroscopy Society instructor – from 2002
• XVII Nürnberger Arthroskopiekurs – lecturer, instructor, Nuremberg 1998
• Sportmedizinischer Seminar, Operationstechniken Knorpeldefekt – lecturer, instructor, Bad Tatzmannsdorf, Austria, 2000
• Arthroscopic Cadaver Practice”- instructor, Budapest 2004, 2005, 2006, 2008, Budapest

Scientific presentations: 65

Published articles, book chapters, manuscripts: 16

Courses, individual further training
• 1988 – Arthroscopy course – Budapest
• 1989 – Arthroscopy individual further training – Straubing (Dr. med. J. Eichorn)
• 1990 – Arthroscopy course – Budapest
• 1990 – AO Ostheosynthesis Workshop
• 1991 – Arthroscopy course – Budapest
• 1991 – Arthroscopic individual further training – OSEI
• 1996 – Arthroscopic individual further training – OSEI
• 1997 – ESSKA scholarship – Salzburg (Univ.- Prof. Dr. H. Resch)
• 1998 – The role of LMWH in the prevention of deep vein thrombosis, Barcelona
• 1999 – Hungarian Society of Traumatology scholarship – Innsbruck (Prof. KP Benedetto)
• 1999 – "Limits of transfusion" HIETE, Budapest
• 1999 – "Chest, abdominal injuries and emergency thoracic surgery symptoms" HIETE, Budapest
• 2001 – 4th Annual Insall Scott Kelly Institute Sports Medicine and Total Knee Symposium , New York, USA
• 2004 - "III. "Arthroscopic Cadaver Practice" shoulder basic and advanced course, Budapest
• 2004 – Eastern European Support Committee, Instructional Course, Budapest
• 2004 – Minimally invasive techniques in orthopedics II, Budapest
• 2005 – „ IV. "Arthroscopic Cadaver Practice" shoulder basic and advanced course, Budapest
• 2005 – Minimally invasive techniques in orthopedics III, Budapest
• 2006 – 12th ESSKA 2000 Congress and cadaver course, Innsbruck
• 2007 – 14th EFORT Instructional Course, Budapest
• 2008 – 1. European Society for Trauma and Emergency Surgery, advanced shoulder arthroscopy course, Budapest
• 2009 – EFORT Instructional Course, Budapest

Corporate memberships

• Hungarian Orthopedic Society
• Hungarian Society of Traumatologists
• Hungarian Arthroscopy Society: board member from 2003, secretary general 2007-2013, president 2013-
• Austrian Society of Traumatology

Dr. Aleksey Kalganov is a highly experienced orthopedic surgeon specializing in hip and knee replacements, with over 1,700 surgeries performed to date. He is the head of the Healthcare Department of the Netanya Municipality, and holds memberships in the European Orthopaedic Research Society and the Israel Orthopaedic Association. He has a medical degree from Tel Aviv University and has trained at the Royal London Hospital.

Yang Young-Joon, MD, is an orthopedic surgeon and Director of the Joint Center. He treats knee and shoulder disorders, sports injuries, foot and ankle problems, carpal tunnel syndrome, and fractures and other trauma. His practice also includes joint replacement, arthroscopic surgery, pediatric orthopedics, hip disorders, hand and foot microsurgery, hand numbness, diabetic foot, hallux valgus, and gout.

He completed his orthopedic surgery residency at Catholic Central Medical Center and an orthopedic surgery fellowship at St. Paul’s Hospital at Catholic Central Medical Center. He is a regular member of the Korean Arthroscopy, Knee, and Shoulder Societies and serves as Director of the Orthopedic Center at Naeun Hospital.

Dr. med. Sven Rogmans is an experienced Orthopaedic and Joint Replacement Surgeon with over 28 years in clinical practice. He treats osteoarthritis using both conservative and surgical methods. He is skilled in minimally invasive hip joint replacement and manages lower limb periprosthetic fractures.

Dr. Rogmans graduated from Ruprecht-Karls-Universität in Heidelberg, Germany. He is known for his advanced arthroscopic surgery for sports injuries. He has published many articles in national and international medical journals, showing his dedication to research and progress in orthopaedics.

EDUCATION

Balgrist University, Zurich

• Shoulder and Elbow Observership, Feb 8th - March 23rd, 2023

Bezmialem Vakif University

• Shoulder and Elbow Surgery Fellowship Program, March 1st - July 2nd, 2021

Istanbul Sisli Etfal Research and Training Hospital

• Residency, Orthopaedic Surgery, 2011-2016

Hospital for Special Surgery, USA

• Observership, May 2nd - June 30th, 2016

Istanbul University, Istanbul Faculty of Medicine

• Medical School, 2003–2009

PROFESSIONAL EXPERIENCE

Istanbul Sisli Hamidiye Etfal Research and Training Hospital

• Residency, Orthopaedic Surgery, 2011-2016

Kilis State Hospital

• Orthopaedics Surgeon, 2017-2019

Yedikule Surp Pırgiç Armenian Hospital

• Orthopaedics Surgeon, 2019-2020

Istanbul Sisli Hamidiye Etfal Research and Training Hospital

• Orthopaedics Surgeon, 2020-2024

Medipol Acıbadem Hospital

• Orthopaedics Surgeon, 2024-present

Place and Date of Birth: 08.12.1983 / ANKARA

Nationality: T.R.

Marital Status: He is married and has 1 child.

Foreign Language: English

Education

•Hamdullah Suphi Tanrıöver Primary School/Istanbul

• Karşıyaka Anatolian High School/İzmir

•Gülhane Military Medical Academy (2001 – 2007)

•Haydarpaşa Numune Hospital Orthopedics Clinic – Specialization (2012-2018)

Professional Experience

•Sahra Medical School Samsun (2007-2008)

•Ankara Gendarmerie Logistics Command Dispensary (2008-2010)

•Üsküdar Private Yunus Emre Hospital Emergency Physician (2010-2012)

•Haydarpaşa Numune Hospital Orthopedics Clinic (2012-2018)

•Şanlıurfa Suruç State Hospital (2018-2019)

•Np Istanbul Brain Hospital Orthopedic Specialist – Surgical Branch Specialist Medical

Deputy Director (2019- December 2020)

Medipol University Pendik Hospital (2020 -)

Member of Scientific Organizations

• Chamber of Physicians

• Turkish Orthopedics and Traumatology Association

• Turkish Industry and Business Association

• Robotic Knee Surgery Association

Scientific Studies

• Prevalence of metabolic syndrome and frequency of cardiovascular risk factors in obese children M.Emre Taşcılar , Bülent Hacıhamdioğlu , Mehmet Soyarslan, Ayhan Abacı

(Gülhane Medical Journal 2010;52 :32-35)

• Determination of the hip rotation centre from landmarks in pelvic radiograph Hasan Bombacı, Bestami Şimşek, Mehmet Soyarslan Murat Yıldırım (Acta orthopaedica et traumatologica turcica 51(6) October 2017)

• Compartment syndrome secondary to Baker’s cyst rupture: A case report and up-todate review Serkan Erkuş, Mehmet Soyarslan, Özkan Köse, Önder Kalenderer

(International Journal of Critical Illness and Injury Science 9(2):82 April 2019)

• Cutibacterium Acnes (Formerly Propionibacterium Acnes) Incidence In Shoulder Arthroscopy and Correlation with the Clinical Status Mehmet Soyarslan, Mehmet Kerem Canbora, Özkan Köse (HNH Medical Journal January 202

• 25. National Orthopedics and Traumatology Congress (2015)

1) Comparison of open and closed surgery in pediatric supracondylar humerus fractures (Poster)

2) What affects the clinical outcome most in open tibia fractures?

Is it the type of treatment chosen or the extent of the damage? (Poster)

3) Does lateral epicondylitis affect grasp strength? (Oral statement)

• 26. National Orthopedics and Traumatology Congress (2016)

1) Detection of hip rotation center in the pelvis X-ray of adult Turkish individuals (Poster)

• Hasan Bombaci* , Bestami Simsek, Mehmet Soyarslan, Mustafa Murat Yildirim, Determination

of the hip rotation centre from landmarks in pelvic radiograph, Acta Orthopaedica et

Traumatologica Turcica, Available online 10 October 2017, doi:

https://doi.org/10.1016/j.aott.2017.09.004

• 38. SICOT World Congress (Cape Town/South Africa 2017)

1) P.acnes Insidence In Shoulder Arthroscopy and Correlation With The Clinical Results

(Poster)

• 27. National Orthopedics and Traumatology Congress (2017)

1) “Propionibacterium acnes” Incidence and Clinical Reflections in Tissue Cultures Taken in Shoulder Arthroscopy

(Oral statement)

• 28. SECEC-ESSE Congress (Geneva/Switzerland 2018)

1) P.acnes Insidence In Shoulder Arthroscopy and Correlation With The Clinical Results

(Oral statement)

• 28. National Orthopedics and Traumatology Congress (2018)

1) Is hip flexion effective on respiratory and hemodynamic parameters of patients who underwent shoulder arthroscopy in the sitting position? (Oral statement)

2) Our Conventional Titanium Plate and PEEK Plate Applications in Multipartite Upper End of Humerus Fractures in Patients aged 55-70 years who were treated with Surgery: Is There a Radiological and Clinical Difference? (Oral statement)

• 10. Shoulder and Elbow Surgery Congress (2018)

1) “P.acnes” Incidence and Clinical Results in Shoulder Arthroscopy: Our Conventional Titanium Plate and PEEK Plate Applications in Multipartite Upper End of Humerus Fractures in Patients aged 55-70 years who were treated with Glenohumeral Joint and Surgery: Is There a Radiological and Clinical Difference? (Oral statement)

2) Evaluation of the Diagnostic Value of the Pain Chart in the Pathologies of the Shoulder in Patients Undergoing Arthroscopic Surgery (Poster)

• 1. Digital Shoulder Elbow Surgery Association Congress (2020)

1) Are the Size of Bone Loss and Number of Anchors Effective in Clinical Results and Failure after Arthroscopic Bankart Repair of Recurrent Shoulder Dislocations?

(Oral statement)

2) K-wire migration into the spinal canal after acromioclavicular dislocation surgery: Case

Presentation (Poster)

VI- Courses

• Training Course of Emergency Medicine Trainer (2007)

• PEV DDH (Developmental Hip Dysplasia and Pes Echinovarus) Course (2016)

• Basic Arthroscopy Course (2016)

• Turkish Orthopedics and Traumatology Education Council Basic Sciences School (2016)

• Acıbadem University Tibia Fractures Cadaver Course (2017)

• Bone and Soft Tissue Tumors Basic Course (2017)

• Knee Joint Arthroscopy and Foot - Ankle Surgical Interventions Applications Cadaver Courses (2017)

• Acıbadem University Advanced Knee Peripheral Sports Injuries Cadaver Course(2018)

• LIMA Corporate Shoulder Surgery Cadaver Course Verona/Italy (2018)

• Gazi University Ankle Arthroscopy Cadaver Course(2019)

• Antalya University Knee Arthroscopy Cadaver Course (2019)

• Antalya University Ankle Arthroscopy Cadaver Course (2019)

• Basic Microsurgery Course – Ankara (2019)

• Antalya University Wrist Arthroscopy Cadaver Course (2019)

Orthopedic traumatologist

Dr. Pedro J. Delgado leads the Hand Surgery service at HM Montepríncipe University Hospital. He is also the head of the Traumatology and Orthopedic Surgery department. His team achieves high success rates in complex hand surgeries. They use advanced techniques and follow evidence-based practices.

Dr. Delgado’s service is known for its multidisciplinary approach and high standards. The team includes specialists with international fellowships and European diplomas. The department reports excellent patient outcomes. It is accredited by top medical organizations in hand surgery.

Dr. Vasily Shmagoy is an experienced orthopedic surgeon. He specializes in knee and hip joint replacement, fracture treatment, and limb deformity correction. He is skilled in advanced procedures such as PRP therapy and joint puncture. These techniques help patients recover faster and achieve better results.

Dr. Shmagoy uses evidence-based methods in his practice. He has performed many successful joint replacements and corrective surgeries. His expertise is well recognized in orthopedics. He is dedicated to ongoing learning and uses the latest techniques in his work.

Dr. Mehmet Taşkoparan is a qualified Orthopaedic Surgeon fluent in English who specializes in spinal fracture surgery, kyphoplasty surgery, endoscopic and percutaneous spinal surgery, three-dimensional knee and hip surgery, minimally invasive trauma surgery, paediatric scoliosis and kyphosis surgery, spinal stenosis, total ankle, shoulder, and finger prostheses, total hip and knee prostheses, rheumatic knee and hip disorders, ESWT (Extracorporeal Shock Wave Therapy) for treatment of heel spur and tennis elbow, interventional arthroscopy (sports injuries and meniscus surgery), treatment of fractures and dislocations, arthroscopic anterior cruciate ligament surgery, shoulder arthroscopy, carpal tunnel, Ulnar Tuzak, and Tarsal tunnel syndrome. He is associated with the Turkish Association of Orthopaedics and Traumatology (TOTBİD), Turkish Medical Association (TMA), Turkish Spine Society, Turkish Association of Orthopedics and Traumatology, and Arthroplasty Socıety.

Education

1993 - 1999 y. MD, Vilnius University
1999 - 2004 y. Orthopaedic surgeon, Vilnius University
2015 y. PhD, Vilnius University

Professional experience

2004 - 2004 y. III Orthopaedics Traumatology department of Republic Vilnius University Hospital, Orthopaedic surgeon
2004 - 2008 y. Traumatology Emergency department of Republic Vilnius University Hospital, Orthopaedic surgeon
From 2004 y. Northway Medicine Centers, Orthopaedic surgeon
From 2005 y. Orthopaedics department of Republic Vilnius University Hospital, Orthopaedic surgeon
From 2005 y. Kardiolita clinic, Orthopaedic surgeon
From 2016 y. Orthopaedics department of Vilnius University Hospital Santariskiu Klinikos, Orthopaedic surgeon

Membership

2005 y. Member of the Lithuanian Society of Orthopaedics and Tramatology
2005 y. Member of the Scientific Society of Orthopaedics and Tramatology of Vilnius Region
2012 y. Board member of the Lithuanian Society of Orthopaedics and Tramatology
2010 y. Member of the Lithuanian Joint Replacement Society
2014 y. Board member of the Lithuanian Joint Replacement Society
2015 y. Member of the Lithuanian Foot and Ankle Society

Training Courses

2002 y. Academic exchange program in Joint Replacements and Orthopaedic Surgery established by the Keggi Orthopaedic Foundation, Waterbury, Connecticut, USA
2005 y. Rigshospitalet of the Copenhagen University Hospital, Copenhagen, Denmark
2005 y. Salzburg Weill Cornell seminars „Bone and Joint Surgery“, Salzburg, Austria
2008 y. Oxford® Partial Knee Advanced Instructional Course, Oxford, UK
2012 y. Difficult Primary and Revision. Knee education. Solzalpe, Austria
2013 y. Biomet 4th Swiss Oxford Instructional Course, Lucerne, Switzerland
2015 y. TKA Primary and Revision. Instructional Courses. Solzalpe, Austria
2015 y. Department of Orthopedics and Tumor Orthopedics, Münster University Hospital, Germany
2015 y. Vitos Orthopedic Clinic, Kassel, Germany
2015 y. Lector in Primary & Revision Knee Courses, Vilnius, Lithuania
2015 y. Primary & Revision Hip Courses, Vilnius, Lithuania
2015 y. NexGen Revision Knee Arthroplasty, Paris, France
2016 y. Interactions Meeting "The Challenge of Revision Hip Arthroplasty”, Hamburg, Germany

Publications

An author and coauthor of numerous published scientific articles and presentations