RT Journal Article SR Electronic T1 Prone positioning for patients with hypoxic respiratory failure related to COVID-19 JF Canadian Medical Association Journal JO CMAJ FD Canadian Medical Association SP E1532 OP E1537 DO 10.1503/cmaj.201201 VO 192 IS 47 A1 Kevin Venus A1 Laveena Munshi A1 Michael Fralick YR 2020 UL http://www.cmaj.ca/content/192/47/E1532.abstract