1. Gastroenterology Department, Affiliated Hospital of Hebei University, No. 212 Yuhua East Road, Baoding, Hebei Province 071000, China
2. 2nd Ward, Department of Urology, Affiliated Hospital of Hebei University, No. 212 Yuhua East Road, Baoding, Hebei Province 071000, China
3. Department of Neurology, Affiliated Hospital of Hebei University, No. 212 Yuhua East Road, Baoding, Hebei 071000, China