TY - JOUR T1 - CORRECTION JF - The Annals of Family Medicine JO - Ann Fam Med SP - 551 LP - 551 DO - 10.1370/afm.1342 VL - 9 IS - 6 A2 - , Y1 - 2011/11/01 UR - http://www.annfammed.org/content/9/6/551.abstract N2 - ER -