1. Department of Oncology, Yixing Hospital Affiliated to the Medical College of Yangzhou University, Yangzhou University, Yixing, Jiangsu 214200, P.R. China
2. Institute of Combination of Chinese Traditional and Western Medicine, Medical College, Yangzhou University, Yangzhou, Jiangsu 225000, P.R. China
3. Department of Physiology, School of Medicine, Showa University, Shinagawa‑ku, Tokyo 142‑8555, Japan