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Critical Reviews in Oncology / Hematology > 2012 > 81 > 2 > 196-205
Journal of Clinical Epidemiology > 2003 > 56 > 3 > 221-229
Critical Reviews in Oncology / Hematology > 2012 > 81 > 2 > 196-205
Journal of Clinical Epidemiology > 2003 > 56 > 3 > 221-229