1. Department of Infectious Diseases, the Second Affiliated Hospital of Nanchang University, School of Pharmaceutical Science, Nanchang University, Nanchang 330006, P. R. China
2. Medical College of Nanchang University, Nanchang University, Nanchang 330006, P. R. China
3. Respiratory Medicine, The First People’s Hospital of Jingdezheng City, Jingdezheng 333000, P. R. China
4. Department of General Surgery, Jiangxi Children’s Hospital, Nanchang 330006, P. R. China
5. Department of Ultrasound, Jiangxi Provincial Maternal and Child Health Hospital, Nanchang 330006, P. R. China