Nagayuki Tani1,2, Asako Hiroshima2, Yutaka Kobayashi2, Kazumasa Igarashi1, Masatoshi Yamazaki1, Hiroshi Nakamura1, Asao Nakazawa1, Seiki Ito1, Akira Shibata1
1First Department of Internal Medicine, Niigata University School of Medicine, Niigata, Japan
2Nanbugou General Hospital, Muramatu, Niigata, Japan