Prevalence surveys: to be taken with a pinch of salt.
Ernst
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Complementary Medicine, Peninsula Medical School, Universities of Exeter and Plymouth, 25 Victoria Park Road, Exeter EX2 4NT, UK. edzard.ernst@pms.ac.uk
D000529:Complementary Therapies / Q000706:statistics & numerical data*; D003625:Data Collection; D007722:Health Knowledge, Attitudes, Practice; D006801:Humans; D010342:Patient Acceptance of Health Care / Q000706:statistics & numerical data*; D015995:Prevalence; D019984:Quality Indicators, Health Care / Q000706:statistics & numerical data*; D015203:Reproducibility of Results; D012107:Research Design; D014481:United States