Radiotherapy Market Forecast to 2028 - COVID-19 Impact and Global Analysis By Type (External-Beam Radiation Therapy, Internal Radiation Therapy, and Systemic Radiotherapy/Radiopharmaceuticals), Product (External Beam Radiotherapy Products, Internal Radiotherapy Products, Radiotherapy Software, and Others), Application (Breast Cancer, Lung Cancer, Prostate Cancer, Colorectal Cancer, Lymphoma, Liver Cancer, Thyroid Cancer, Brain Cancer, Cervical Cancer, Spine Cancer, and Others), and End User (Hospitals, Radiation Therapy Centers, and Specialty Clinics), and Geography