1. Department of Radiology, Guangdong Academy of Medical Sciences/Guangdong General Hospital, No. 106 Zhongshan Er Road, Guangzhou, Guangdong Province 510080, China
2. Department of Radiology, HuiZhou Municipal Central Hospital, No. 41 E Ling Bei Road, Huizhou, Guangdong Province 516008, China
3. Southern Medical University, No. 1838 Dadao Bei Road, Guangzhou, Guangdong Province 510515, China
4. F. M. Kirby Research Center for Functional Brain Imaging, Kennedy Krieger Institute, Baltimore, MD, USA
5. The Russell H. Morgan Department of Radiology and Radiological Science, Division of MR Research, Johns Hopkins University School of Medicine, Baltimore, MD, USA