title: The un-managed system of Medicare referrals.
authors.forename: Alice Hm
authors.initials: AH
authors.lastname: Chen
authors.forename: Diane
authors.initials: D
authors.lastname: Rittenhouse
mesh_terms: D005260:Female; D006801:Humans; D008297:Male; D058007:Physicians, Primary Care; D010818:Practice Patterns, Physicians' / Q000706:statistics & numerical data*; D012017:Referral and Consultation / Q000706:statistics & numerical data*