1. Division of Colorectal Surgery, Department of Surgery, Taichung Veterans General Hospital, Taichung 40705, Taiwan
2. Department of Food and Nutrition, Providence University, Taichung 43301, Taiwan
3. Department of Nutrition, Chung Shan Medical University, Taichung 40201, Taiwan
4. Department of Nutrition, Chung Shan Medical University Hospital, Taichung 40201, Taiwan
5. Chiayi & Wanqiao Branch, Taichung Veterans General Hospital, Chiayi 60090, Taiwan