1. Department of Anesthesiology, Brooke Army Medical Center, Fort Sam Houston, TX 78234, USA
2. Department of Anesthesia, Tripler Army Medical Center, Honolulu, HI 96859, USA
3. Department of Orthopaedic Surgery, Brooke Army Medical Center, Fort Sam Houston, TX 78234, USA
4. Defense and Veterans Center for Integrative Pain Management, Department of Anesthesiology, Uniformed Services University, Bethesda, MD 20814, USA
5. Henry M. Jackson Foundation Inc, Rockville, MD 20852, USA