title: Gaining enough market share may be a PSO's biggest challenge.
mesh_terms: D002204:Capitation Fee; D019058:Community Networks / Q000191:economics* / Q000458:organization & administration / Q000706:statistics & numerical data; D003284:Contract Services / Q000191:economics; D019981:Health Care Sector; D008389:Marketing of Health Services / Q000379:methods*; D006278:Medicare / Q000458:organization & administration*; D014481:United States