[1] Virginia Commonwealth Univ, Dept Phys Med & Rehabil, Sch Med, Richmond, VA USA
[2] Cent Virginia VA Healthcare Syst, Dept Phys Med & Rehabil, 1201 Broad Rock Blvd, Richmond, VA 23249 USA
[3] Providence VA Med Ctr, Res Dept, Providence, RI USA
[4] Brown Univ, Hlth Serv Policy & Practice, Sch Publ Hlth, Providence, RI USA