机构:
Univ Penn Hlth Syst, Dept Rehabil Med, Philadelphia, PA 19104 USA
Univ Penn Hlth Syst, Inst Aging, Philadelphia, PA USA
Univ Penn Hlth Syst, Inst Med & Bioengn, Philadelphia, PA USAUniv Penn Hlth Syst, Dept Rehabil Med, Philadelphia, PA 19104 USA