Department of Science and Education, First People's Hospital of Changde City, Changde 415003, Hunan, People's Republic of China. Changsha Center for Disease Control and Prevention, Changsha 410001, Hunan, People's Republic of China. Department of Oncology, First People's Hospital of Changde City, Changde 415003, Hunan, People's Republic of China. Department of Neurology, Second Affiliated Hospital of Nanchang University, Nanchang 330006, Jiangxi, People's Republic of China. Department of Oncology, Affiliated Hospital of Zunyi Medical University, Address: NO.149, Dalian Road, Zunyi City, Guizhou Province, China, 653000.