title: Radiation therapy advanced certification. 1991 survey results.
mesh_terms: D002170:Canada; D002568:Certification / Q000706:statistics & numerical data*; D003625:Data Collection; D004496:Education, Continuing / Q000706:statistics & numerical data; D005069:Evaluation Studies as Topic; D011878:Radiotherapy / Q000592:standards*; D013679:Technology, Radiologic / Q000592:standards*