After-hours services in a prepaid group practice.
D000328:Adult; D003258:Consumer Behavior; D003255:Consumer Organizations; D004632:Emergency Medical Services / Q000706:statistics & numerical data; D005260:Female; D006123:Group Practice; D006801:Humans; D007354:Insurance, Major Medical; D008297:Male; D009519:New York City; D010820:Physicians / Q000706:statistics & numerical data; D012737:Sex Factors; D013689:Telephone; D013997:Time Factors