title: Physician visits: volume and interval since last visit. United States--1969.
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D002648:Child; D002675:Child, Preschool; D003710:Demography; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D010820:Physicians / Q000706:statistics & numerical data*; D012494:Sampling Studies; D012959:Socioeconomic Factors; D013223:Statistics as Topic; D013997:Time Factors; D014481:United States