RT Journal Article SR Electronic T1 Taking the pulse of pulse oximetry in Africa JF Canadian Medical Association Journal JO CMAJ FD Canadian Medical Association SP E244 OP E245 DO 10.1503/cmaj.109-4121 VO 184 IS 5 A1 Jocelyn Edwards YR 2012 UL http://www.cmaj.ca/content/184/5/E244.abstract