“…[8,26]. Older controlled studies of RT for nonmalignant disorders have been inadequate due to lack of state-of-the-art scientific methods, i.e., lack of appropriate study design, inadequate definition of inclusion and exclusion criteria, incomplete consideration of confounding factors, lack of prospective long-term evaluation and adequate endpoints [3,23,38]. Graves' orbitopathy [15,24] and heterotopic ossification prophylaxis [4,10,11,31,34] are good examples of improved clinical efforts and clinical studies, as RT for nonmalignant diseases will only be broadly accepted if a favorable risk/benefit ratio is established.…”