Citation:Hellman S, Hellman DS 1991

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Hellman S, Hellman DS. Of mice but not men. Problems of the randomized clinical trial. N Engl J Med 1991 May 30 [cited 2014 May 20];324(22):1585-9 Abstract available at http://www.ncbi.nlm.nih.gov/pubmed/2027362.



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