1. Department of Infectious Diseases, the Second Affiliated Hospital of Xi’an Jiaotong University
2. National & Local Joint Engineering Research Center of Biodiagnosis and Biotherapy, the Second Affiliated Hospital of Xi’an Jiaotong University
3. Shaanxi Clinical Research Center of Infectious Diseases
4. Key Laboratory of Environment and Genes Related to Diseases, Xi’an Jiaotong University, Ministry of Education of China, Xi’an, PRC
5. Division of Gastroenterology and Hepatology
6. Department of Epidemiology and Population Health, Stanford University Medical Center, Palo Alto, California, USA