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clinicaltrials.gov Identifier: NCT00029146.
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William J. Powers
William R. Clarke
Robert L. Grubb
JAMA
Washington University in St. Louis
University of North Carolina at Chapel Hill
University of Iowa
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Powers et al. (Tue,) studied this question.
www.synapsesocial.com/papers/69dbca0cf7e0c66ced83652a — DOI: https://doi.org/10.1001/jama.2011.1610