Patterns of utilization among members of a prepaid group practice.
D000367:Age Factors; D001290:Attitude; D004185:Disability Evaluation; D005260:Female; D006279:Health Maintenance Organizations; D006296:Health Services / Q000706:statistics & numerical data*; D006801:Humans; D008297:Male; D008393:Marriage; D008962:Models, Theoretical; D010820:Physicians / Q000706:statistics & numerical data*; D012737:Sex Factors; D012959:Socioeconomic Factors; D014481:United States