Patients' needs and physician role.
D000328:Adult; D000367:Age Factors; D000368:Aged; D003191:Comprehensive Health Care; D003258:Consumer Behavior; D004358:Drug Therapy; D005260:Female; D006123:Group Practice; D006801:Humans; D008297:Male; D008875:Middle Aged; D010044:Outpatient Clinics, Hospital; D010348:Patient Care Team; D010414:Pennsylvania; D010817:Physician-Patient Relations; D012494:Sampling Studies; D012940:Social Problems