RT Journal Article SR Electronic T1 The Surprising Chronicity of Abdominal Pain in Children JF The Annals of Family Medicine JO Ann Fam Med FD American Academy of Family Physicians SP iii OP iii DO 10.1370/afm.1255 VO 11 IS 3 YR 2013 UL http://www.annfammed.org/content/11/3/iii.abstract AB