Affiliation: | (1) Department of Orthopaedic Surgery, Sapporo Medical University School of Medicine, S1, W17, Sapporo 060-8556, Japan;(2) Department of Pathology, Sapporo Medical University School of Medicine, Sapporo, Japan;(3) Department of Neuroscience, Albert Einstein College of Medicine, Bronx, N.Y., USA;(4) Department of Rehabilitation, Sapporo Medical University School of Medicine, Sapporo, Japan |