1. Department of Infection; People's Hospital of Xuyi; Xuyi Jiangsu P.R. China
2. Department of Gastroenterology; People's Hospital of Xuyi; Xuyi Jiangsu P.R. China
3. Department of Infection; The First Affiliated Hospital of Nanjing Medical University and Jiangsu Province Hospital; Nanjing Jiangsu P.R. China