1 Division of Gastroenterology, Endoscopic Center, Changhua Christian Hospital, Changhua, Taiwan; Yuan Lin Branch, Department of Hospital Management, MingDao University, Changhua, Taiwan. Electronic address: ychen02@gmail.com.
2 Department of Pathology, Changhua Christian Medical Center, Changhua, Taiwan.
3 Department of Medicine, China Medical University, Taichung, Taiwan.