PT - JOURNAL ARTICLE AU - Paul Gessell TI - Elusive to the end AID - 10.1503/cmaj.121761 DP - 2012 Jan 01 TA - Canadian Medical Association Journal PG - cmaj.121761 4099 - http://www.cmaj.ca/content/early/2012/11/05/cmaj.121761.short 4100 - http://www.cmaj.ca/content/early/2012/11/05/cmaj.121761.full