Primary health care - to search the health strategies in the 80s.
D002648:Child; D002662:Child Health Services / Q000639:trends; D003153:Community Health Services / Q000639:trends*; D004506:Education, Nursing; D005260:Female; D006266:Health Education; D006801:Humans; D008427:Maternal Health Services / Q000639:trends; D011247:Pregnancy; D011320:Primary Health Care / Q000639:trends*; D012572:School Health Services / Q000639:trends; D012846:Singapore