1. From the Department of Medical Ultrasonics, Institute of Diagnostic and Interventional Ultrasound, The First Affiliated Hospital of Sun Yat-Sen University, No. 58 Zhongshan Er Road, Guangzhou 510080, People’s Republic of China (X.L., Y.Z., X.W., L.Z., G.H., M.L., B.Z., X.X., M.X.); and Department of Medical Ultrasonics, Guangzhou 11th People’s Hospital, Guangzhou, People’s Republic of China (H.Z.).