title: Build-up studies with three different types of cobalt--60 teletherapy units.
mesh_terms: D003037:Cobalt Radioisotopes / Q000627:therapeutic use*; D006801:Humans; D008954:Models, Biological; D011867:Radioisotope Teletherapy; D011879:Radiotherapy Dosage; D012867:Skin / Q000528:radiation effects*
chemical_list: D003037:Cobalt Radioisotopes