Determinants of medical care utilization: the role of the telephone in total medical care.
D000328:Adult; D000367:Age Factors; D000368:Aged; D001291:Attitude of Health Personnel; D019411:Clinical Laboratory Techniques; D003142:Communication; D003695:Delivery of Health Care; D011307:Drug Prescriptions; D005191:Family Characteristics; D005260:Female; D006123:Group Practice; D006801:Humans; D007348:Insurance, Health; D008297:Male; D008875:Middle Aged; D009017:Morbidity; D009922:Oregon; D010820:Physicians / Q000706:statistics & numerical data; D011336:Probability; D012737:Sex Factors; D013689:Telephone