1. Department of Pathology, Shengjing Hospital of China Medical University, Shenyang, Liaoning 110004, P.R. China
2. Department of Stem Cell and Regeneration, College of Basic Medical Science of China Medical University, Shenyang, Liaoning 110122, P.R. China
3. Department of Oncology, Shengjing Hospital of China Medical University, Shenyang, Liaoning 110004, P.R. China