1 Division of Bioinformatics, Niigata University Graduate School of Medical and Dental Sciences, Niigata, Japan; Division of Cancer Genome Informatics, Niigata University Graduate School of Medical and Dental Sciences, Niigata, Japan.
2 Division of Bioinformatics, Niigata University Graduate School of Medical and Dental Sciences, Niigata, Japan. Electronic address: okd@med.niigata-u.ac.jp.