Abboud Joseph A, Ricchetti Eric T, Tjoumakaris Fotios, Ramsey Matthew L
Department of Orthopaedic Surgery, Pennsylvania Hospital, University of Pennsylvania Health System, Philadelphia 19107, USA.
J Am Acad Orthop Surg. 2006 May;14(5):312-8. doi: 10.5435/00124635-200605000-00007.