title: Timer error: the possibility of confusion arising from two different sign conventions.
authors.forename: S B
authors.initials: SB
authors.lastname: Samat
authors.forename: C J
authors.initials: CJ
authors.lastname: Evans
authors.forename: T
authors.initials: T
authors.lastname: Kadni
mesh_terms: D003037:Cobalt Radioisotopes / Q000627:therapeutic use; D004868:Equipment Failure; D006801:Humans; D011786:Quality Control; D011867:Radioisotope Teletherapy / Q000295:instrumentation*
chemical_list: D003037:Cobalt Radioisotopes