1 Department of Gastroenterology, Zhongshan Hospital Affiliated to Xiamen University, Xiamen, Fujian Province, China.
2 Department of Cardiology, Xiamen Cardiovascular Hospital of Xiamen University, School of Medicine, Xiamen University, Xiamen, Fujian Province, China.
3 Department of Pathology, Zhongshan Hospital Affiliated to Xiamen University, Xiamen, Fujian Province, China.