World survey of radioisotope teletherapy units.
D003625:Data Collection; D004864:Equipment and Supplies; D006801:Humans; D011867:Radioisotope Teletherapy; D011868:Radioisotopes; D011878:Radiotherapy / Q000600:supply & distribution*
D011868:Radioisotopes
RADIOISOTOPES; RADIOTHERAPY/equipment and supplies