1 Division of Gastroenterology, Changhua Christian Hospital, Changhua, Taiwan.
2 Department of Surgical Pathology, Changhua Christian Hospital, Changhua, Taiwan.
3 Division of Gastroenterology, Changhua Christian Hospital, Changhua, Taiwan; General Education Center, Chienkuo Technology University, Changhua, Taiwan; College of Medicine, National Chung Hsing University, Taichung, Taiwan.