1. National-Regional Key Technology Engineering Laboratory for Medical Ultrasound; Guangdong Key Laboratory for Biomedical Measurements and Ultrasound Imaging; School of Biomedical Engineering; Shenzhen University; No. 3688 Nanhai Road, Nanshan District Shenzhen 518060 Guangdong P. R. China
2. Department of Breast Cancer; Affiliated Hospital of Academy of Military Medical Sciences; No. 8 Dongdajie Beijing 100071 P. R. China