[1] Columba Univ, Columbia Stem Cell Initiat, 650West 168th St,BB1108, New York, NY 10032 USA
[2] Shinshu Univ, Sch Med, Dept Orthopaed Surg, 3-1-1 Asahi, Matsumoto, Nagano 3908621, Japan
[3] Shinshu Univ, Sch Hlth Sci, Phys Therapy Div, 3-1-1 Asahi, Matsumoto, Nagano 3908621, Japan
[4] Shinshu Univ, Interdisciplinary Cluster Cutting Edge Res, Inst Biomed Sci, 3-1-1 Asahi, Matsumoto, Nagano 3908621, Japan