Donald P Endrizzi1, Daniel J Shubert2, Raymond R White3. 1. Department of Surgery, Division of Orthopedics, Maine Medical Center, Portland, ME, USA. Electronic address: endrid1@mmc.org. 2. Tufts University School of Medicine, Boston, MA, USA. 3. Department of Surgery, Division of Orthopedic Trauma, Maine Medical Center, Portland, ME, USA.