[1] Harvard Univ, Spaulding Rehabil Hosp, Sch Med, Boston, MA 02114 USA
[2] Boston Univ, Boston, MA 02215 USA
[3] Univ Washington, Seattle, WA 98195 USA
[4] Univ Pittsburgh, Pittsburgh, PA USA
[5] Univ Florida, Gainesville, FL USA
[6] Pyles Sutter & Verville PC, Washington, DC USA
[7] Univ Texas, Med Branch, Galveston, TX USA
[8] Case Western Reserve Univ, Cleveland, OH 44106 USA
[9] Rehabil Inst Chicago, Chicago, IL USA
[10] Univ Michigan, Ann Arbor, MI USA