PT - JOURNAL ARTICLE ED - , TI - A brief review of the literature DP - 2007 Sep 01 TA - Canadian Family Physician PG - 1515--1515 VI - 53 IP - 9 4099 - http://www.cfp.ca/content/53/9/1515.short 4100 - http://www.cfp.ca/content/53/9/1515.full SO - Can Fam Physician2007 Sep 01; 53