1. Department of Pathology; Keck School of Medicine; University of Southern California; Los Angeles; California; 90033; USA
2. Institute of Life Sciences; Fuzhou University; Fuzhou; Fujian; 350108; China
3. Oral and maxillofacial surgery; Xiangya Hospital; Central South University; No. 87 Xiangya Rd.; Changsha; 410008; China