[1] Montefiore Med Ctr, Coll Phys & Surg, New York, NY USA
[2] Montefiore Med Ctr, Dept Pediat, New York, NY USA
[3] Columbia Univ, Dept Orthoped, Med Ctr, New York, NY USA
[4] Columbia Univ, Athlet Dept, New York, NY 10027 USA
[5] Columbia Univ, Dept Neurol, Taub Inst Res Alzheimer Dis & Aging Brain, New York, NY 10027 USA
[6] Columbia Univ, GH Sergievsky Ctr, New York, NY 10027 USA