Proton Therapy Market Size and Forecasts (2020 - 2030), Global and Regional Share, Trends, and Growth Opportunity Analysis Report Coverage: By Set up Type ( Single Room, Multiple Room ); Indication ( Head and Neck Cancer, Brain Cancer, Sarcoma, Pediatric Cancer, Gastro-intestinal Cancer, Prostate Cancer, Lung Cancer ), and Geography (North America, Europe, Asia Pacific, and South and Central America)