Page 21 - Best MRI of one area doctors: TOP 529 doctors

Education

Undergraduate: Faculty of Medicine, Istanbul University Cerrahpaşa Faculty of Medicine, 2000-2006
MSc/Medical Specialization: Pediatrics, Şişli Etfal Training and Research Hospital, 2007-2012
PhD/Subspecialization in Medicine: Child Neurology, Medipol University, 2014-2017

Experience

Medical Specialization Research Assistant: Department of Physiology, Istanbul University Çapa Faculty of Medicine, 2006-2007
Specialist Doctor/State Service Obligation: Pediatrics, Sanliurfa Suruc State Hospital, 2012-2014
Subspecialty Specialist/Public Service Obligation: Pediatric Neurology, Istanbul Gaziosmanpaşa Training and Research Hospital, 2017-2020
Subspecialty Specialist Doctor/Dr. Faculty Member: Child Neurology, Istinye University Hospital, 2020-2024

Scientific Memberships
 

Turkish Medical Association
Child Neurology Association of Turkey

Medical Intrests

• Epilepsy
• Fiery Remittance
• Treatment of Resistant Epilepsy
• Sleep Disorders
• Cerebral Palsy
• Risky Baby Monitoring
• Speech Delay
• Walking Delay
• Autism
• Headache
• Migraine
• Neurological Developmental Delay

My 34 years of medicine – which is more than half my life… After thousands of surgeries, the excitement and sense of responsibility of the first day still outweigh it. My father was a doctor, a neurologist too. I would always give the same response to those asking what I would be in elementary and secondary school: Neurosurgeon. When I started my neurosurgery residency at Haydarpaşa Numune Hospital in 1992, my childhood goal was fulfilled. Two points have always stood out from the others throughout my medical career: 1. Don’t harm anyone. 2. The most important relationship between the doctor and patient is the relationship of trust. In line with the principle of “first do no harm” in Turkish with “primum non nocere” in Latin, I have always preferred to perform secured surgeries under the microscope from smaller incisions. I didn’t perform any surgery that I wasn’t sure the patient would benefit from. So I’ve always been in a position to convince myself first of the need for surgery. Then I convince my patient. I kept in mind that the most important relationship between surgeon and patient is the relationship of trust. How can a person entrust his life to someone he saw 15 minutes ago without a relationship of trust? I cared about this relationship lasting post-surgery and even for life. I’ve had the first walks of my patients that I’ve operated in 28 years. Sometimes even after midnight many times… I’ve always cared about some patients’ feeling of their need to see their physician even at 03.00 o’clock midnight. I don’t mind giving all my patients my cell phone number. I would want my physician to be available at any time as needed. That’s what I do for my patients. In these lines, I felt the need to describe my view of medicine. Anyone who wonders anyway can reach my resume and my publications.

Dr. Cengiz Sen is an Orthopedics and Traumatology specialist. He has expertise in revision arthroplasty, degenerative joint disease, congenital limb deformities, and pediatric orthopedic disorders. Dr. Sen is skilled in limb lengthening, pseudoarthrosis surgery, and managing periprosthetic infections. He is also a pioneer in using stem cell therapy for orthopedic conditions.

Dr. Sen has published many articles, especially on total knee replacement and infected nonunion. He is a professor at Istanbul University Faculty of Medicine. He has received the AOTT Oral Presentation Award for his academic and clinical achievements.

Dr. Hilmi Apak is a respected pediatric hematology-oncology specialist with more than 21 years of experience. He is trained in pediatric oncology. Dr. Apak has led advanced treatments, including bone marrow transplantation, leukemia chemotherapy, and CAR T-cell therapy.

He has published 75 international medical articles, showing his strong contribution to pediatric oncology research. Dr. Apak has worked as assistant editor for the Turkish Pediatrics Archives Periodical. He has also held important academic and leadership positions, such as Head of Pediatric Hematology-Oncology at Istanbul University-Cerrahpaşa.

Education:

• Higher Education (6 Years): Marmara University Faculty of Medicine, 2001
• Specialization in Medicine: Istanbul University Istanbul Faculty of Medicine, 2007
   

Experience:

• Faculty of Medicine, University of Rostock, Department of Cardiac Surgery - Research Assistant, August 2007 - August 2008
• King Faisal Specialist Hospital and Research Center, King Faisal Heart Institute - Fellow, August 2008 - October 2008
• Private Göztepe Şafak Hospital, October 2008 - April 2009
• Private Esnaf Hospital, May 2009 - March 2010
• Düzce Atatürk State Hospital, March 2010 - September 2011
• Private Anadolu Medical Center Hospital, October 2011 - June 2013
• Istanbul University Istanbul Faculty of Medicine, July 2013 - December 2018
• Istanbul Medipol University Faculty of Medicine, January 2019 - April 2023
• Biruni University Faculty of Medicine, April 2023 - Present
•  
• Professor: December 18, 2020
• Associate Professor: April 16, 2015-December 18, 2020
• Specialist Doctor: November 2009- April 16, 2015
• Research assistant: June 2002 - July 2007
• Faculty of Medicine: Marmara University - English (1995-2001)[Diploma Grade: 75/100] - Listed in the World Directory of Medical Schools.

Awards:

Second best oral presentation award: Didem Melis Öztaş, Mert Meriç, Metin Onur Beyaz, Mehmet Akif Onalan, Shiraslan Bakhshaliyev, Kıvılcım Sönmez, Kerem Oter, Sedat Ziyade, Beyhan Ömer, Ufuk Alpagut, Murat Uğurlucan. Investigation of the Effect of Erythropoietin on Stem Cell Levels in Cardiovascular Tissue in Diabetic Rats. 19th National Vascular and Endovascular Surgery Congress, Kyrenia, Cyprus, October 26-29, 2019.

Prof. Dr. Birol Baytan is a respected pediatric hematologist. He focuses on diagnosing and treating childhood cancers, leukemia, anemia, and bleeding disorders. He graduated from Ankara University Medical Faculty in 1992. He completed his specialization at Uludağ University Faculty of Medicine, Department of Child Diseases.

Prof. Baytan has published 15 articles in international journals. He has presented and published 9 full texts at international scientific meetings. He has contributed to 3 books or book chapters. He has also published 8 articles in local journals. These achievements show his strong academic presence in pediatric hematology.

Specializes in neurological disorders, treatment, and rehabilitation. Addresses epilepsy, sleep disorders, headaches, cerebrovascular diseases and movement issues.

Areas of Interests

• General Gastrointestinal Diseases
• Endoscopic procedures (gastroscopy, colonoscopy, enteroscopy, capsule endoscopy)
• Interventional endoscopy
• ERCP
• Endoscopic ultrasonography (EUS)
• Cholangioscopy
• Diseases of the biliary system and pancreas

Education:
 

• 1990 -1996 Ankara University Faculty of Medicine
• 1997 - 2001 Ankara Numune Training and Research Hospital Internal Medicine Residency
• 2001 - 2003 Turkey High Specialization Training and Research Hospital, Gastroenterology Subspecialization
• 2010 - 2010 State University of New York, USA, Department of Gastroenterology, EUS training program
   

Experience:
 

• June 2024 LIV Hospital Ulus Hospital
• 2018 - 2024 Florence Nightingale Hospitals, Gastroenterology Clinic
• 2013 - 2018 Memorial Ataşehir Hospital, Gastroenterology Clinic
• 2008 - 2013 Gaziantep University Faculty of Medicine, Department of Gastroenterology, Assoc. Prof. Dr.
• 2008 - 2008 Medicalpark Gaziantep Hospital Gastroenterology Clinic
• 2004 - 2008 Gaziantep State Hospital Gastroenterology Clinic, Endoscopy Unit Founding Physician

Publications

• Arhan M, Koklu S, Koksal AS, Yolcu OF, Koruk S, Koruk I, Kayacetin E. Alverine citrate induced acute hepatitis. World J Gastroenterol 2004; 10(15): 2303-4  ISSN: 1007-9327
• Parlak E, Cicek B, Koruk I, Disibeyaz S, Sahin B. Successful prevention of stent migration caused by placement of a second stent. Endoscopy. 2005; 37(4): 404. ISSN: 0013-726X
• Koruk I, Ozturk ZA, Köklü S, Koruk S, Ozdede S. Port-site metastasis after laparoscopic cholecystectomy. Acta Gastroenterol Belg. 2008; 71(2): 283-4      ISSN:0001-5644
• Koruk I, Parlak E, Secilmis S, Akdogan M, Koklu S.  Endoscopic sphincteroplasty with large balloon dilatation for extraction of difficult common bile duct stones. Dig Dis Sci. 2008 Jun;53(6):1737-8. ISSN: 0163-2116
• Ozkaya M, Yuzbasioglu MF, Koruk I, Cakal E, Sahin M, Cakal B. Preoperative detection of insulinomas: two case reports. Cases J. 2008 Nov 29; 1(1): 362  ISSN: 1757-1626
• Yılmaz Ö, Koruk İ, Çayır K, Koruk M, Yılmaz A. Usefullness of serum insulin-like growth factor (IGF-1) and insulin-like growth factor binding protein-3 (IGFBP-3) for colorectal cancer diagnosis. Int J Hematol Oncol 2009; 19(1): 23-27  ISSN: 1306-133X
• Savaş C, Koruk İ, Koruk M, Kadayıfçı A, Sarı İ. Association of prion protein with the stage of liver fibrosis in chronic viral hepatitis. Trakya Univ Tip Fak Derg. 2010; 27(4): 373-7. DOI: 10.5174/tutfd.2009.02284.1 ISSN: 1301-3149
• Buyukberber M, Koruk I, Cıkman O, Koruk M, Kucukoglu ME, Sakman A, Demir O, Sahinoz S. Serum cystatin C measurement in differential diagnosis of intra and extrahepatic cholestatic diseases. Ann Hepatol 2010; 9(1): 58-62  ISSN: 1665-2681
• Gulsen MT, Koruk I, Dogan M, Beyazit Y. Diagnostic accuracy of cascade stomach by upper gastrointestinal endoscopy in patients with obscure symptoms: A multi-center prospective trial. Clin Res Hepatol Gastroenterol. 2011; 35: 489-93. DOI: 10.1016/j.clinre.2011.03.004         ISSN: 2210-7401
• Koruk I, Aydın U, Koruk S, Aydınlı M. A newly defined biliary anatomic variation. Turk J Gastroenterol 2011; April 22(2): 232-3  DOI:10.4318/ tjg.2011.0204  ISSN: 1300-4948
• Koruk İ, Özdemir H, Aydınlı M, Tarakçıoğlu M, Koruk M. The relation between serum Cytokeratin 18 and acute pancreatitis: Can it be a serological predictive marker?. Turk J Gastroenterol. 2011. DOI:10.4318/tjg.2011.0256 ISSN: 1300-4948
• Aydinli M, Koruk I, Koruk S, Aydin U, Kadayifci A. Intraoperative cholangioscopy with an ultrathin endoscope for hemobilia. Endoscopy 2011;43 Suppl 2 UCTN:E410. doi: 10.1055/s-0030-1256897. Epub 2012 Jan 24
• Aydinli M, Koruk I, Dag MS, Savas MC, Kadayifci A. Ultrathin endoscopy for gastrointestinal strictures. Digestive Endoscopy 2012 May;24(3):150-3. doi: 10.1111/j.1443-1661.2011.01206.x. Epub 2011 Oct 27                 ISSN: 0915-5635
• Yılmaz Ö, Koruk İ, Onbaş O, Ozgokce M. Portal venous gas resulting from enteritis in a case with portal hypertension: Case report. Türkiye Klinikleri Tıp Bilimleri Dergisi. 2012; 32 (4): 1195-8 ISSN: 1300-0292
• Demiryürek S, Koruk I, Bozdag Z, Ozkara E, Kaplan DS, Oztuzcu S, Cetinkaya A, Alasehirli B, Demiryürek AT. Investigation of the esophageal Rho-kinase expression in patients with Barrett's esophagus. Ultrastruct Pathol. 2013 Aug;37(4):284-9. doi: 10.3109/01913123.2013.797064        ISSN: 0191-3123
• Dag MS, Ozturk ZA, Koruk I, Kısacık B, Gerenli O, Aydınlı M, Kadayıfcı A. Intestinal Behcet's disease with severe pulmonary arterial involvement mimicking ulcerative colitis. Asian Biomedicine. 2013; 7(5): 715-8      ISSN: 1905-7415
• Dağ MS, Aydınlı M, Oztürk ZA, Türkbeyler IH, Koruk I, Savaş MC, Koruk M, Kadayıfçı A. Drug- and herb-induced liver injury: a case series from a single center. Turk J Gastroenterol. 2014 Feb;25(1):41-5. doi: 10.5152/tjg.2014.4486ISSN: 1300-4948
• Kadayifci A, Atar M, Parlar S, Balkan A, Koruk I, Koruk M. Transnasal endoscopy is preferred by transoral endoscopy experienced patients. J Gastrointestin Liver Dis. 2014 Mar;23(1):27-31     ISSN: 1841-8724
• Alasehirli B, Oğuz E, Oksuzler E, Koruk I, Oztuzcu S, Ozkara E, Karakok M, Erbagcı AB, Demiryurek AT. Investigation of intercellular adhesion molecules (ICAMs) gene expressions in patients with Barrett's esophagus. Tumour Biol. 2014 May;35(5):4907-12. doi: 10.1007/s13277-014-1644-3      ISSN: 1010-4283
• Dag M, Özturk Z, Aydınlı M, Koruk I, Kadayfçı A. Postpartum hepatotoxicity due to herbal medicine Teucrium polium. Ann Saudi Med. 2014 Nov-Dec;34(6):541-3. doi: 10.5144/0256-4947.2014.541        ISSN: 0256-4947
• Tahtacı M, İbiş M, Koruk İ, Parlak E. Endoscopic removal of fractured basket traction wire. Turk J Gastroenterol. 2014 Dec;25 Suppl 1:324-5. doi: 10.5152/tjg.2014.6582            ISSN: 1300-4948
• Dağ MS, Koruk İ, Aydınlı M, Çam H, Öztürk ZA, Kadayıfçı A. An unusual cause of esophageal ulcer; sertraline hydrochloride. Turk J Gastroenterol. 2014 Dec;25 Suppl 1:250-1. doi: 10.5152/tjg.2014.4646  ISSN: 1300-4948
• Balkan A, Yılmaz N, Balkan Y, Koruk İ, Örkmez M, Aydınlı M, Koruk M. Relationship between liver injury and serum cytokeratin 18 levels in asymptomatic hepatitis B virus carriers and in patients with chronic hepatitis B infection. Arab Journal of Gastroenterology. 2017; 18: 98–103                   ISSN: 1687-1979
• Koruk İ. How to manage difficult cannulation in ERCP. Gastroenterology and Hepatology: Open Access. 2017, 6(3): 00194. DOI: 10.15406/ghoa.2017.06.00194 ISSN: 2373-6372
• Valori R, Cortas G, de Lange T, Balfaqih OS, de Pater M, Eisendrath P, Falt P, Koruk I, et al.  Performance measures for endoscopy services: A European Society of Gastrointestinal Endoscopy (ESGE) Quality Improvement Initiative.  Endoscopy 2018; 50: 1186–1204   ISSN 0013-726X
• Koruk S, Koruk I, Mizrak A. A, Bilgi M, Gul R, Bozgeyik S. Dexmedetomidine or midazolam in combination with propofol for sedation in endoscopic retrograde cholangiopancreatography: a randomized double blind prospective study. Videosurgery Miniinv. 2020; 15(3): 526-32 doi.org/10.5114/wiitm.2020.95066

Medical Interests and Activities 

• Gastrointestinal diseases 

• Oncologic laparoscopic surgery 

• Anorectal area diseases 

• Urgent surgical cases (acute cholecystitis, divertikülit, ileus, pankreatit, appendicitis) 

• Colon and rectum cancer 

• Treatment of oncologic surgical cases with further laparoscopic and robotic surgery. • Laparoskopik hernia surgery 

• Esophagus and stomach cancer 

• Selim anorectal diseases (hemorrhoidal disease, anal fissure), perianal fistula, pilonoidal sinus (hairless- non-surgical treatment)

Education and Experience 

• İstanbul University Medical Faculty 1988 • University of Colorado Health Science Center – Intern Surgeon 

• Isparta, Dedeçam Şehit Ramazan Karaca Health Center (1995-1996) • İstanbul Surgery Hospital – American Hospital (2000-2001) 

• Chief assistant Istanbul Medical Faculty, Department of General Surgery (2001-2008) • World Congress on Peritonel Surface Malignancies (HIPEC course) Berlin, Germany (2012) 

• USC Keck School of Medicine, Los Angeles, CA, USA (2006-2007) 

• Assoc. Prof. M.D. , İstanbul Medical Faculty General Surgery (2008-2014) 

• Da Vinci Robotic Intensive Course at IRCAD, Strasbourg, France (2011) 

• Stony Brook Medicine Cadaver Training Event in Colon and Rectal Surgery, New York, USA (2016) (Instructor) 

• Fellow of the European Board of Surgery- Emergency Surgery (FEBS EmSurg) Honorary Diploma (2017) 

• Prof. M.D. , İstanbul Medical Faculty General Surgery (2014 -2017) 

• İstanbul University Medical Faculty – General Surgery Master of Science 1996 

• University of Southern California Medical Center, Department of General Surgery, Los Angeles, USA – February 2006 – February 2007

Scientific Publications • Endoscopic Laparoscopic & Minimal Invasive Surgery Journal Editorial Board / National Scientific Committee • UTACD Assist. Editor

Areas of Interests

• MR Linac
• Three Dimensional Brachytherapy
• Four Dimensional (4D) Radiotherapy
• Stereotactic RT & IMRT
• Breast Cancer, Gynecological Cancers
• Head – Neck Cancers
• Urological Tumors, Gastrointestinal Cancers
• Lung Cancer
• Central Nervous System Tumors & Metastases
• Skin Cancers
• Soft Tissue Tumors

Education:

• Istinye University Medical Faculty, Professor Doctor (2017 – Continued)
• Istine University Medical Faculty Associate Professor Doctor (2016 – 2017)
• Liv Hospital Radiation Medicine Center, Tbilisi, Georgia, Radiation Oncology Consulting Docor (2016 – 2019)
• Liv Hospital, Radiation Oncology (2015 – Continued)
• Istanbul University Oncology Institution, Associate Professor (2012 – 2015)
• Stereotactic Radiotherapy, Thoracic Oncology, University of North Carolina, NC, USA (2010 – 2011)
• Kocaeli University Radiation Oncology Department, Associate Professor Assistant (2006 – 2009)
• GATA Radiation Oncology Department, Specialist Doctor, Reserve Officer (2004 – 2005)
• Istanbul University, Medical Faculty, Dr.R.A. (1999 – 2004)
• Istanbul University, Medical Faculty, Under-Graduate (1993 – 1999)
   

Experience:

• Istinye University Medical Faculty
• Liv Hospital Ulus
• Istanbul University Oncology Institution
• University of North Carolina, NC, USA
• Kocaeli University Medical Faculty
• Istanbul University, Medical Faculty

Areas of Interests

• Pituitary Diseases
• Thyroid Diseases
• Obesity
• Diabetes
• Female and Male Reproductive System Diseases
• Parathyroid Diseases
• Adrenal Gland Diseases
• Osteoporosis and Metabolic Bone Diseases

Education:

• Hacettepe University Faculty of Medicine
• Bezmialem Foundation University
• Health Sciences University Bakirkoy Dr. Sadi Konuk Training and Research Hospital
• Cleveland Clinic, The Endocrinology and Metabolism Institute observer physician
• University of Piemonte Orientale, SCDU Endocrinology, Italy, observer physician
   

Experience:
 

• Mehmet Akif Inan Training and Research Hospital
• Bakirkoy Dr. Sadi Konuk Training and Research Hospital
• Bezmialem Vakif University Hospital
• Malatya State Hospital

Dr. Gokhan Kursat Kara is an orthopaedic surgeon with expertise in spine surgery, arthroplasty, and trauma and deformity correction. He graduated from Istanbul University Medical Faculty. He completed his residency in orthopaedics and traumatology at Uludag University.

Dr. Kara has worked at several top hospitals. He has been with Liv Hospital since 2016. He has published many articles in peer-reviewed journals. His research covers tendon repair, developmental dysplasia of the hip, spinal arthropathy, and surgical methods for scoliosis and vertebral fractures.

Areas of Interests

• Parkinson's disease
• Essential tremor
• Dystonia and other involuntary movements
• Balance and gait disorders
• Alzheimer's Disease and other dementias
• Spasticity
• Brain vascular diseases
• Migraine and other headaches
• Epilepsy
• Botulinum toxin application in dystonia
• Botulinum toxin application in spasticity
• Botulinum toxin application in migraine headache

Education:

• Bachelor of Medicine Ankara University 1988-1994
• Medical Specialization Neurology Ankara University Faculty of Medicine 1995-2000
• Associate Professorship Neurology Cumhuriyet University Faculty of Medicine 09/10/ 2013

Experience:

• General Practitioner Ankara Yenimahalle Health Center 1994-1995
• Research Assistant Ankara University Faculty of Medicine, Department of Neurology 1995-2000
• Specialist Dr. Sevgi Milennium Hospital 2000-2001
• Specialist Dr. Deda Brain Spinal Cord Diseases Center 2001-2002
• Specialist Dr. Pamukkale University Faculty of Medicine 2002-2003
• Specialist Dr Sivas Numune Hospital 2003-2007
• Specialist Dr. Private Sivas Anadolu Hospital 2007-2009
• Asst. Assoc. Dr. Department of Neurology, Cumhuriyet University Faculty of Medicine, Sivas 2009-2013
• Assoc Prof Dr Neurology Department AD, Cumhuriyet University Faculty of Medicine, Sivas October 2013- October 2016
• Assoc Prof Dr Medicana Sivas Hospital- March 2017-June 2020
• Assoc Prof Dr Medicana International Ankara Hospital August 2020-

Dr. Itir Sirinoglu Temiz is a Professor of Hematology. She specializes in lymphoma, acute and chronic leukemias, multiple myeloma, thrombocytopenias, thrombosis, anemia, and bone marrow failure. She graduated with honors from Istanbul University Cerrahpaşa Faculty of Medicine. She completed her hematology training at Dr. Abdurrahman Yurtarslan Oncology Education and Research Hospital.

Dr. Sirinoglu Temiz has held key academic and administrative positions. She served as Head of Internal Medicine at IAU Faculty of Medicine. She was also Education and Administrative Manager at SBÜ Bakırköy Dr. Sadi Konuk EAH Hematology Clinic. She has broad experience in adult hematology, stem cell transplantation, and therapeutic apheresis. She currently practices at Liv Hospital.

Dr. Erkancakir is a specialist in pediatric chest diseases. He has experience with acute and chronic respiratory problems, respiratory tract infections, and bronchoscopic procedures. His areas of focus include asthma, sleep-related breathing disorders, cystic fibrosis, and tuberculosis.

He completed his medical degree at Istanbul University. He continued his specialty training at Göztepe Training and Research Hospital and Marmara University. Dr. Erkancakir has worked at leading institutions, such as Bezmialem Vakıf University and Süreyyapaşa Chest Diseases Training and Research Hospital.

He is an active member of several professional organizations, including the Turkish Thoracic Society and the European Respiratory Society. Dr. Erkancakir has received more than 20 national and international awards for his research and presentations, especially in pediatric pulmonology and cystic fibrosis.

Dr. Cagri Canbolat is a neurosurgeon. He specializes in neuro-oncological surgery, skull base surgery, neurovascular surgery, minimally invasive spinal surgery, oncological spinal surgery, pediatric neurosurgery, neuro-trauma, and neuro-intensive care. He completed his medical education and neurosurgery training at Cumhuriyet University Faculty of Medicine from 2005 to 2018.

Dr. Canbolat has contributed to research on the therapeutic effects of Etanercept and Ustekinumab in spinal cord injury models. He has also studied the genetics of neural tube defects. His publications include work on primary central nervous system lymphoma and surgical outcomes in elderly patients with intracranial meningioma. He has analyzed 228 cases in these studies.

He has worked at Liv Hospital Vadistanbul, Memorial Service Hospital, Acıbadem Maslak Hospital, and Vezirköprü State Hospital.

Dr. Binnur Simsek is a gastroenterology specialist. She has experience in liver cirrhosis, portal hypertension, hepatocellular carcinoma, liver transplantation, and viral hepatitis (B, C, Delta). She also treats alcoholic and non-alcoholic fatty liver disease, peptic ulcers, gastrointestinal bleeding, and inflammatory bowel diseases such as ulcerative colitis and Crohn’s colitis.

She completed her medical and gastroenterology training at Istanbul University Faculty of Medicine. Dr. Simsek has worked at Istanbul University, Sanlıurfa Education and Research Hospital, Liv Hospital, and Istinye University. She is a member of the Turkish Association for the Study of the Liver and the Turkish Society of Gastroenterology.