RT Journal Article SR Electronic T1 A painful and knotted nasogastric tube JF Canadian Medical Association Journal JO CMAJ FD Canadian Medical Association SP 568 OP 568 DO 10.1503/cmaj.070750 VO 178 IS 5 A1 Shruti Niranjan Tapaiwala MD A1 Dawood Al Riyami MD A1 Edward Cole MD YR 2008 UL http://www.cmaj.ca/content/178/5/568.abstract