Global Medical Tourism Market Size, Share & Demand Report By Treatment Type (Cosmetic & Aesthetic Procedures, Dental Treatments, Orthopedic Surgeries, Cardiovascular Treatments, Fertility & IVF Services, Oncology & Cancer Care, Bariatric Surgeries, Ophthalmology Treatments, Wellness & Preventive Care), By Traveler Type (Individual Travelers, Family Travelers, Couples, Group Wellness Travelers), By Service Provider (Private Hospitals, Public Hospitals), By Region & Segment Forecasts, 2025–2030