| Turkey | Austria | Spain | |
| Nasal polyp surgery | from $2,000 | from $4,500 | from $2,800 |
| Endoscopic Sinus Surgery | from $2,500 | from $3,500 | from $3,000 |
Dr. Luis Madero is the Head of Pediatric Hemato-Oncology at Quironsalud Madrid University Hospital. He specializes in treating complex blood disorders and performing bone marrow transplants. Dr. Madero serves as a Professor of Pediatrics at the Autonomous University of Madrid. He works at Quironsalud Madrid, which Newsweek ranked among the World's Best Hospitals.