PT - JOURNAL ARTICLE AU - Lauren Vogel TI - Advance directives: obstacles in preparing for the worst AID - 10.1503/cmaj.109-3743 DP - 2011 Jan 11 TA - Canadian Medical Association Journal PG - E39--E40 VI - 183 IP - 1 4099 - http://www.cmaj.ca/content/183/1/E39.short 4100 - http://www.cmaj.ca/content/183/1/E39.full SO - CMAJ2011 Jan 11; 183