1 Department of Clinical Laboratory, Xiangyang No.1 People's Hospital, Hubei University of Medicine, Xiangyang, China.
2 School of Public Health, Harbin Medical University, Harbin, China.
3 Department of Gastroenterology, Gaozhou people's hospital, Maoming, China; Department of Medicine I, University Hospital, LMU Munich, Munich, Germany. Electronic address: wanjinlong390@gmail.com.