Corresponding Author: 
Kazuya Fujihara, MD, PhD
Niigata University Faculty of Medicine
Department of Internal Medicine
1-757 Asahimachi, Niigata, Niigata, Japan, 951-8510
Phone +81-25-368-9026 Fax +81-29-368-9300
Email kafujihara-dm@umin.ac.jp