PT - JOURNAL ARTICLE AU - Lydia Kang TI - Returns AID - 10.1503/cmaj.100434 DP - 2010 Aug 10 TA - Canadian Medical Association Journal PG - E538--E538 VI - 182 IP - 11 4099 - http://www.cmaj.ca/content/182/11/E538.short 4100 - http://www.cmaj.ca/content/182/11/E538.full SO - CMAJ2010 Aug 10; 182