The needs for database research and for privacy collide.
Hyman
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D003219:Confidentiality / Q000331:legislation & jurisprudence; D003625:Data Collection / Q000592:standards* / Q000706:statistics & numerical data; D019992:Databases as Topic / Q000592:standards / Q000706:statistics & numerical data*; D017041:Ethics Committees; D006801:Humans; D012107:Research Design / Q000592:standards; D014481:United States; D014483:United States Dept. of Health and Human Services