RT Journal Article SR Electronic T1 What Does It Cost to Change Behavior? JF The Annals of Family Medicine JO Ann Fam Med FD American Academy of Family Physicians SP 197 OP 198 DO 10.1370/afm.1413 VO 10 IS 3 A1 Christiansen, Bruce A. YR 2012 UL http://www.annfammed.org/content/10/3/197.abstract AB