Sixty-five years of prepayment.
D005376:Financial Management; D006123:Group Practice / Q000266:history*; D006125:Group Practice, Prepaid / Q000191:economics / Q000266:history*; D049672:History, 19th Century; D049673:History, 20th Century; D006801:Humans; D007400:Interprofessional Relations; D010819:Physician's Role; D012017:Referral and Consultation; D014861:Washington