1. Division of Clinical Nutrition, Shiga University of Medical Science, Otsu, Shiga 520‑2192, Japan
2. Division of Gastroenterology, Shiga University of Medical Science, Otsu, Shiga 520‑2192, Japan
3. Division of Gastrointestinal Surgery, Shiga University of Medical Science, Otsu, Shiga 520‑2192, Japan