1. Department of Pathology, Pingdingshan Medical District (formerly 152 Central Hospital), 989 Hospital of PLA Joint Logistic Support Force, Pingdingshan, Henan, China
2. Department of Gastroenterology, Pingdingshan Medical District (formerly 152 Central Hospital), 989 Hospital of PLA Joint Logistic Support Force, Pingdingshan, Henan, China
3. Department of Endocrinology, Pingdingshan Municipal First People's Hospital, Pingdingshan, Henan, China
4. Department of Pathology, Beijing Chaoyang Hospital, Capital Medical University, Beijing, China