1. Jiangxi Ecological Meteorology Center, Jiangxi Meteorological Bureau, Nanchang, China
2. Department of Occupational and Environmental Health, School of Public Health, Sun Yat-sen University, Guangzhou, China
3. Department of Gastroenterology and Hepatology, Jiangxi Provincial People’s Hospital, Nanchang University, Nanchang, China
4. Gastroenterology and Operative Endoscopy Unit, Siena University Hospital, Siena, Italy