1. Medical Imaging Center, The First Affiliated Hospital of Jinan University, Guangzhou, Guangdong 510630, P.R. China
2. School of Public Health, Guangzhou Medical University, Guangzhou, Guangdong 511436, P.R. China
3. Key Laboratory of Molecular Target and Clinical Pharmacology, School of Pharmaceutical Sciences and Fifth Affiliated Hospital, Guangzhou Medical University, Guangzhou, Guangdong 510799, P.R. China