title: Persons hospitalized by number of episodes and days hospitalized in a year. United States--1972.
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D005260:Female; D006760:Hospitalization; D006801:Humans; D007902:Length of Stay; D008297:Male; D008875:Middle Aged; D014481:United States