| Turchia | Austria | Spagna | |
| Plasmaferesi | da $1,200 | da $2,000 | da $1,800 |
| Plasmaferesi DFPP | da $1,850 | - | - |
| Aferesi selettiva | da $1,550 | - | - |
Dr. Mustafa Serdar Sag is a rheumatologist at Medipol Acibadem District Hospital in Istanbul. He specializes in treating ankylosing spondylitis and rheumatoid arthritis. Dr. Sag holds dual board certifications in Physical Medicine and Rehabilitation and Rheumatology.