Y Q Li1, S S Song2, S H Jiang3, X Y Zhang2. 1. Department of Oncology, The Second Affiliated Hospital of Guangzhou Medical University, Guangzhou. Electronic address: katherineli1969@qq.com. 2. Department of Medicine, Asclegen Technology Inc., Shanghai, P. R. China. 3. Department of Oncology, The Second Affiliated Hospital of Guangzhou Medical University, Guangzhou.