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Sounding Boards. Historical controls: the practitioner's clinical trials.

Abstract

Source DB: PubMed Journal: N Engl J Med ISSN： 0028-4793 Impact factor: 91.245

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Authors: T U Hoogenraad; C J Van den Hamer; J Van Hattum
Journal: Br Med J (Clin Res Ed) Date: 1984-08-04

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