title: Pennsylvania HMOs demonstrate that prevention works.
mesh_terms: D019985:Benchmarking; D006279:Health Maintenance Organizations / Q000592:standards* / Q000706:statistics & numerical data; D006760:Hospitalization / Q000706:statistics & numerical data; D006801:Humans; D010414:Pennsylvania; D011314:Preventive Health Services / Q000592:standards* / Q000706:statistics & numerical data