From the Division of Pharmacoepidemiology, Department of Preventive Medicine, Vanderbilt University School of Medicine and Geriatric Research, Education and Clinical Center, Nashville VAMC (WAR), Nashville, Tennessee. Address correspondence to: Wayne A. Ray, PhD, Division of Pharmacoepidemiology, Department of Preventive Medicine, Vanderbilt University School of Medicine and Geriatric Research, Education and Clinical Center, Nashville VAMC (WAR), Nashville, TN 37232.
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Wayne A. Ray (2000) studied this question.
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