1. Department of Gastroenterology and Metabolism, Nagoya City University Graduate School of Medical Sciences, Mizuho-Ku, Nagoya, Japan
2. Department of Gastroenterology, Nagoya City West Medical Center, Kita-Ku, Nagoya, Japan
3. Department of Pathobiology, Nagoya City University Graduate School of Pharmaceutical Sciences, Mizuho-Ku, Nagoya, Japan
4. Department of Biochemistry and Molecular Biology, University of Calgary, Calgary, Alberta, Canada