^○Sang Kyu Park, Myeong Soo Song (Department of Neurosurgery, Incheon St. Mary's Hospital, The Catholic University of Korea)

^○Seung Hoon You¹, Seong Cheol Park¹, Su Hee Cho¹, Ku Hyun Yang¹, Woo-Young Jang², Moon-Kyu Lee², Kwang-Deog Jo¹ (1.Department of Neurosurgery, Gangneung Asan Hospital, College of Medicine, Ulsan University, Gangneung, Korea, 2.Department of Neurology, Gangneung Asan Hospital, College of Medicine, Ulsan University, Gangneung, Korea)

^○Jung Hyun Park, Il Yong Sin, Hyung Sik Hwang (Dongtan Sacred Heart Hospital, Hallym University, South Korea)

^○Sukh Que Park, Hye Ran Park, Jae-Chil Chang, Sung-Jin Cho, Hyung-Ki Park (Department of Neurosurgery, Soonchunhyang University Seoul Hospital, Seoul, Korea)

^○Jin-Young Jung (Department of Neurosurgery, Cerebrovascular Center, Dong-Eui Medical Center, Busan, Korea)

^○Ku Hyun Yang¹, Seong Cheol Park¹, Su Hee Cho¹, Seung Hoon You¹, Woo-Young Jang², Moon-Kyu Lee², Kwang-Deog Jo² (1.Department of Neurosurgery, Gangneung Asan Hospital, College of Medicine, Ulsan University, Gangneung, Korea, 2.Department of Neurology, Gangneung Asan Hospital, College of Medicine, Ulsan University, Gangneung, Korea)

^○Dong-Seong Shin, Kim Bum-Tae (Department of Neurosurgery, Soonchunhyang University Bucheon hospital, South Korea)

^○Byung-Rae Cho, Dong-Kyu Jang, Sang-Kyu Park, Byung-Hoo Moon, Kyung-Sool Jang (Department of Neurosurgery, Incheon St. Mary's Hospital, College of Medicine, The Catholic University of Korea, Incheon.)

^○Seung Hun Sheen (Bundang Jaeseng Hospital, Korea)