[1] Baylor Coll Med, H Ben Taub Dept Phys Med & Rehabil, Houston, TX 77030 USA
[2] Massachusetts Gen Hosp, Dept Med, Boston, MA USA
[3] NewYork Presbyterian Columbia Univ, Med Ctr, Dept Rehabil & Regenerat Med, New York, NY USA
[4] Univ Hlth Network, Dept Phys Med & Rehabil, Toronto, ON, Canada
[5] Univ Colorado, Dept Phys Med & Rehabil, Denver, CO 80202 USA
[6] Michael E DeBakey VA Med Ctr, Spinal Cord Injury Care Line, Houston, TX USA