The epidemiological imperative for primary care.
D001294:Attitude to Health; D003625:Data Collection / Q000592:standards; D003662:Decision Theory; D004812:Epidemiologic Methods; D005260:Female; D006296:Health Services / Q000706:statistics & numerical data; D006297:Health Services Accessibility; D006801:Humans; D008297:Male; D010043:Outcome and Process Assessment, Health Care; D011247:Pregnancy; D011320:Primary Health Care; D012306:Risk; D012803:Sick Role; D006113:United Kingdom