1. Department of Biomedical Engineering, Johns Hopkins University School of Medicine, Baltimore, MD, USA
2. Department of Physical Medicine and Rehabilitation, Johns Hopkins University School of Medicine, Baltimore, MD, USA
3. Department of Anesthesiology & Critical Care Medicine, Johns Hopkins University School of Medicine, Baltimore, MD, USA
4. Department of Neurology and Neurosurgery, Johns Hopkins University School of Medicine, Baltimore, MD, USA
5. Department of Oncology, Johns Hopkins University School of Medicine, Baltimore, MD, USA
6. Department of Orthopaedic Surgery, Johns Hopkins University School of Medicine, Baltimore, MD, USA