Who's kidding whom?
D000328:Adult; D001294:Attitude to Health; D003710:Demography; D006801:Humans; D007398:Interpersonal Relations; D007750:Labor Unions; D008396:Maryland; D001523:Mental Disorders / Q000534:rehabilitation; D012494:Sampling Studies; D012959:Socioeconomic Factors; D011795:Surveys and Questionnaires