Use of the telephone in a health maintenance service for the chronically ill: a preliminary report.
D000328:Adult; D000368:Aged; D000553:Ambulatory Care; D002908:Chronic Disease / Q000628:therapy*; D003142:Communication; D003153:Community Health Services; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D009519:New York City; D013689:Telephone