title: Aetna takes exit cue. Low reimbursement rates cause nine-state pullback.
authors: C
authors: C
authors: Rauber
mesh_terms: D000368:Aged; D002204:Capitation Fee; D017047:Cost Sharing; D006279:Health Maintenance Organizations / Q000191:economics* / Q000639:trends; D006801:Humans; D016345:Medicare Part B / Q000191:economics*; D008873:Mid-Atlantic Region; D020414:Risk Sharing, Financial; D014481:United States