PT - JOURNAL ARTICLE ED - , TI - Correction DP - 2011 Aug 01 TA - Canadian Family Physician PG - 879--879 VI - 57 IP - 8 4099 - http://www.cfp.ca/content/57/8/879.4.short 4100 - http://www.cfp.ca/content/57/8/879.4.full SO - Can Fam Physician2011 Aug 01; 57