Affiliation: | a Department of Pathology, Institute of Basic Medical Sciences, University of Tsukuba, Ibaraki, 305-8575, Japan;b Center for Medical Sciences, Ibaraki Prefectural University of Health Sciences, Ibaraki, 300-0331, Japan;c Howard Hughes Medical Institute and Department of Biochemistry and Biophysics, University of Pennsylvania School of Medicine, Philadelphia, Pennsylvania, 19104-6148 |