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Contemporary Clinical Trials > 2008 > 29 > 5 > 635-645
Journal of Biomedical Informatics > 2003 > 36 > 4-5 > 232-239
Contemporary Clinical Trials > 2008 > 29 > 5 > 635-645
Journal of Biomedical Informatics > 2003 > 36 > 4-5 > 232-239