1. Department of Pathology, West China Hospital, Sichuan University, Chengdu, Sichuan 610041, China
2. Department of Hematology, West China Hospital, Sichuan University, Chengdu, Sichuan 610041, China
3. Huaxi Magnetic Resonance Research Center, Department of Radiology, West China Hospital, Sichuan University, Chengdu, Sichuan 610041, China
4. Institute of Public Health, Feinberg School of Medicine, Northwestern University, Chicago, Illinois 60611, USA