Global Proton Therapy Market Assessment, By Product Type [Systems, Services], By Indications [Head and Neck Cancer, Central Nervous System Cancer, Prostate Cancer, Breast Cancer, Lung Cancer, Pediatric Cancer, Gastrointestinal Cancer, Others], By Setup Type [Single-Room Systems, Multi-Room Systems], By End-user [Hospitals, Proton Therapy Centers, Cancer Centers or Institutes], By Region, Opportunities and Forecast, 2018-2032F