RT Journal A1 Kocher, Mininder S. A1 Zurakowski, David T1 Clinical Epidemiology and Biostatistics: A Primer for Orthopaedic Surgeons JF The Journal of Bone & Joint Surgery JO The Journal of Bone & Joint Surgery YR 2004 FD March 1 VO 86 IS 3 SP 607 OP 620 DO UL http://dx.doi.org/ AB