RT Journal Article SR Electronic T1 Can CPAP prevent the need for endotracheal intubation in patients with hypoxemia after abdominal surgery? JF Canadian Medical Association Journal JO CMAJ FD Canadian Medical Association SP 744 OP 744 DO 10.1503/cmaj.050193 VO 172 IS 6 A1 Ryan Foster A1 Damon C. Scales YR 2005 UL http://www.cmaj.ca/content/172/6/744.abstract