title: Letter: Minimizing surface dose with medium Z electron shields.
mesh_terms: D003037:Cobalt Radioisotopes / Q000627:therapeutic use; D011835:Radiation Protection; D011867:Radioisotope Teletherapy; D011879:Radiotherapy Dosage; D012542:Scattering, Radiation
chemical_list: D003037:Cobalt Radioisotopes