1. Huaxi MR Research Center (HMRRC) Department of Radiology Functional and molecular imaging Key Laboratory of Sichuan Province West China Hospital Sichuan University Chengdu 610041 China
2. West China School of Medicine Sichuan University Chengdu 610041 China
3. Amgen Bioprocessing Centre Keck Graduate Institute CA 91711 USA
4. Research Unit of Psychoradiology Chinese Academy of Medical Sciences Chengdu 610041 China