Cancer direct-mail quiz gets "fast, frenzied" response.
D006305:Health Status Indicators; D006306:Health Surveys; D006745:Hospital Bed Capacity, 300 to 499; D006761:Hospitals; D006801:Humans; D007087:Illinois; D008389:Marketing of Health Services; D009369:Neoplasms / Q000517:prevention & control*; D011795:Surveys and Questionnaires