[1] Virginia Commonwealth Univ, Sch Med, Dept Phys Med & Rehabil, Richmond, VA USA
[2] Univ New Hampshire, Dept Kinesiol, Brain Res & Assessment Initiat New Hampshire Lab, Durham, NH USA
[3] Sanford Res, Environm Influences Hlth & Dis Grp, Sioux Falls, SD USA
[4] Duquesne Univ, Dept Athlet Training, Pittsburgh, PA USA
[5] Univ Lynchburg, Coll Hlth Sci, Dept Athlet Training, Lynchburg, VA USA
[6] Univ Texas Southwestern Med Ctr, Dept Psychiat, Dallas, TX USA
[7] Univ Texas Southwestern Med Ctr, Dept Phys Med & Rehabil, Dallas, TX USA
[8] Univ Virginia, Sch Med, Dept Psychiat & Neurobehav Sci, Charlottesville, VA USA
[9] Univ Virginia, Dept Kinesiol, Charlottesville, VA USA
[10] Virginia Commonwealth Univ, Sch Med, Dept Phys Med & Rehabil, 1223 E Marshall St,Box 980677, Richmond, VA 23298 USA