Department of Infectious Diseases;
Union Hospital;
Tongji Medical College;
Huazhong University of Science and Technology;
Wuhan 430022;
China;
Department of Anatomy;
School of Basic Medical Sciences;
Tongji Medical College;
Huazhong University of Science and Technology;
Wuhan 430030;
China;
Department of Gastroenterology;
the Central Hospital of Wuhan;
Tongji Medical College;
Huazhong University of Science and Technology;
Wuhan 430014;
China;