RT Journal Article SR Electronic T1 Purple urine bag syndrome JF Canadian Medical Association Journal JO CMAJ FD Canadian Medical Association SP 491 OP 491 DO 10.1503/cmaj.071604 VO 179 IS 5 A1 Tan, Che-Kim A1 Wu, Ya-Ping A1 Wu, Hsing-Ying A1 Lai, Chih-Cheng YR 2008 UL http://www.cmaj.ca/content/179/5/491.abstract