1 E. T. Newman, J. Lans, J. Kim, J. Schwab, K. Raskin, S. A. Lozano-Calderon, Department of Orthopaedic Surgery, Massachusetts General Hospital, Boston, MA, USA.
2 M. Ferrone, J. Ready, Department of Orthopaedic Surgery, Brigham and Women's Hospital, Boston, MA, USA.