Spinal Muscular Atrophy Market, by Type (Type I, Type II, Type III, and Type IV), by Treatment (Gene Therapy and Disease-modifying drugs), by Age Group (Infant and Adult), by Route of Administration (Oral and Injectables), by Distribution Channel (Hospital Pharmacies, Retail Pharmacies, and Online Pharmacies), and by Region (North America, Latin America, Europe, Asia Pacific, Middle East, and Africa) - Size, Share, Outlook, and Opportunity Analysis, 2024 - 2031