University blocks efforts to reveal researchers' identity.
Lehrman
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D002140:California; D003219:Confidentiality / Q000331:legislation & jurisprudence*; D006801:Humans; D012106:Research / Q000331:legislation & jurisprudence*; D012907:Smoking / Q000009:adverse effects*; D014495:Universities / Q000331:legislation & jurisprudence*