Bone Neoplasms--radiotherapy Fractures, Bone--radiotherapy Humans Hypercalcemia--radiotherapy Pain--radiotherapy Pain Measurement Phosphorus Radioisotopes--therapeutic use Radioisotopes--therapeutic use Randomized Controlled Trials as Topic Ruthenium Radioisotopes--therapeutic use Samarium--therapeutic use Spinal Cord Compression--radiotherapy Strontium Radioisotopes--therapeutic use