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Mayo Clinic
Health Affairs | December 6, 2006 | Volume: 25 | Issue: Suppl1 | Pages: W68-W71
10.1377/hlthaff.26.1.w68
Health Affairs | November 7, 2006 | Volume: 25 | Issue: Suppl1 | Pages: W593-W595
10.1377/hlthaff.25.w593