title: Private-sector health care initiatives: a comparative perspective from four communities.
mesh_terms: D001900:Boston; D002140:California; D003120:Colorado; D003363:Cost Control; D005381:Financing, Organized; D006279:Health Maintenance Organizations / Q000191:economics; D007348:Insurance, Health / Q000191:economics*; D007484:Iowa; D007750:Labor Unions