RT Journal Article SR Electronic T1 Prone positioning JF Clinical Medicine JO Clin Med FD Royal College of Physicians SP e280 OP e280 DO 10.7861/clinmed.Let.20.6.4 VO 20 IS 6 A1 Mohan Mishra YR 2020 UL http://www.rcpjournals.org/content/20/6/e280.1.abstract