PT - JOURNAL ARTICLE ED - American Academy of Family Physicians TI - A Paradoxical Effect? AID - 10.1370/afm.1681 DP - 2014 Jul 01 TA - The Annals of Family Medicine PG - iii--iii VI - 12 IP - 4 4099 - http://www.annfammed.org/content/12/4/iii.short 4100 - http://www.annfammed.org/content/12/4/iii.full SO - Ann Fam Med2014 Jul 01; 12