Effect of a neighborhood health center on hospital emergency room use.
D000328:Adult; D003153:Community Health Services; D004636:Emergency Service, Hospital / Q000706:statistics & numerical data*; D005260:Female; D005381:Financing, Organized; D005382:Financing, Personal; D006801:Humans; D008297:Male; D008404:Massachusetts; D010820:Physicians; D012017:Referral and Consultation; D012494:Sampling Studies; D013223:Statistics as Topic