1. Department of Pathology and State Key Laboratory of Cancer Biology, Xijing Hospital, Fourth Military Medical University, Xi'an, Shaanxi Province, People's Republic of China.
2. Department of Gastroenterology, Urumqi Military General Hospital, Urumqi, Xinjiang, People's Republic of China.
3. Department of Hematology, Xijing Hospital, Xi'an, Shaanxi Province, People's Republic of China.
4. Department of Pathology, Tangdu Hospital, Fourth Military Medical University, Xi'an, Shaanxi Province, People's Republic of China.