1 Department of Neurosurgery, The Third Affiliated Hospital of Sun Yat-sen University, Guangzhou, Guangdong 510630, China.
2 Department of Radiology, The Third Affiliated Hospital of Sun Yat-sen University, Guangzhou, Guangdong 510630, China.
3 Department of Internal Medicine, The Third Affiliated Hospital of Sun Yat-sen University, Guangzhou, Guangdong 510630, China.
4 Department of Neurosurgery, The Third Affiliated Hospital of Sun Yat-sen University, Guangzhou, Guangdong 510630, China. Electronic address: doctorwanghui@126.com.
5 Department of Neurosurgery, The Third Affiliated Hospital of Sun Yat-sen University, Guangzhou, Guangdong 510630, China. Electronic address: chenchuangd@hotmail.com.