1. Integrated Hospital of Traditional Chinese MedicineSouthern Medical University 13# Shiliugang Road Haizhu District Guangzhou 510315 P. R. China
2. Department of RadiologyThe Third Affiliated Hospital of Sun Yat-Sen University Guangzhou 510630 P. R. China
3. Guangdong Provincial Key Laboratory of New Drug ScreeningSchool of Pharmaceutical SciencesSouthern Medical University Guangzhou 510515 P. R. China