1. Department of Surgery, University of Nebraska Medical Center, Omaha, Nebraska, USA.
2. Department of Surgery, Center for Advanced Surgical Technology, University of Nebraska Medical Center, Omaha, Nebraska, USA.
3. Department of Physical Medicine and Rehabilitation, Harvard Medical School, Massachusetts General Hospital, Brigham and Women's Hospital, Spaulding Rehabilitation Hospital, Boston, Massachusetts, USA.
4. Department of Dermatology, Boston University School of Medicine, Boston Medical Center, Boston, Massachusetts, USA.
5. Northeastern University Health and Counseling Services, Boston, Massachusetts, USA.
6. Department of Anesthesiology, University of Nebraska Medical Center, Omaha, Nebraska, USA.