1 Department of Anesthesiology, University of Texas Health Science Center at San Antonio, San Antonio, TX(∗).
2 Department of Anesthesiology, University of Texas Health Science Center at San Antonio, San Antonio, TX(†).
3 Department of Physical Medicine and Rehabilitation, Inpatient Pain Service Veterans Health Service, Los Angeles, CA(‡).
4 Department of Physical Medicine & Rehabilitation, UCLA/VA of Greater Los Angeles Healthcare System, Los Angeles, CA(¶).
5 Physical Medicine and Rehabilitation, Weill Cornell Medical College, 525 E 68th Street, Baker 16, New York, NY 10065(§). Electronic address: jrs9012@med.cornell.edu.