title: Sex differences in the use of physician services: a preliminary test of the fixed role hypothesis.
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D002140:California; D005260:Female; D006306:Health Surveys; D006801:Humans; D008297:Male; D008875:Middle Aged; D008960:Models, Psychological; D010548:Personal Health Services / Q000706:statistics & numerical data*; D012380:Role; D012737:Sex Factors; D013997:Time Factors