1. Department of Gastroenterology, China-Japan Union Hospital of Jilin University, Changchun, Jilin 130033, P.R. China
2. Department of Dermatology, China-Japan Union Hospital of Jilin University, Changchun, Jilin 130033, P.R. China
3. Department of Nuclear Medicine, China-Japan Union Hospital of Jilin University, Changchun, Jilin 130033, P.R. China
4. Department of Emergency, China-Japan Union Hospital of Jilin University, Changchun, Jilin 130033, P.R. China