US cash registers humming as Canadian patients flock south.
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D002170:Canada / Q000208:ethnology; D006760:Hospitalization / Q000191:economics* / Q000639:trends; D006801:Humans; D007348:Insurance, Health / Q000191:economics; D008389:Marketing of Health Services; D016320:Substance Abuse Treatment Centers / Q000191:economics / Q000706:statistics & numerical data; D014481:United States