1. Department of Gastroenterology and Metabolism, Nagoya City University Graduate School of Medical Sciences, Nagoya, Japan
2. Department of Gastroenterology, Aichi Medical University, Nagakute, Japan
3. Department of Gastroenterology, Japanese Red Cross Nagoya Daini Hospital, Nagoya, Japan
4. Okazaki Public Health Center, Okazaki, Japan
5. Vascular Biology Program, Boston Children's Hospital, Boston, MA, USA
6. Department of Surgery, Harvard Medical School and Boston Children's Hospital, Boston, MA, USA