Sang-Ho Lee, MD, PhDChairman, Wooridul Spine Hospital, Seoul, South Korea.Founder and Honorary President, World Congress of Minimally Invasive Spinal Surgery and Techniques.Clinical professor of Anatomy, Yonsei University College of Medicine. Sang-Ha Shin, MDDirector, Wooridul International Minimally Invasive Spine Surgery Fellowship Program,Department of Neurological Surgery, Chungdam Wooridul Spine Hospital, Seoul, South Korea. Junseok Bae, MDPresident and Medical Director,Director, Wooridul International Minimally Invasive Spine Surgery Fellowship Program.Department of Neurological Surgery,Chungdam Wooridul Spine Hospital, Seoul, South Korea. Sang-Joon Park, MDDepartment of Neurological Surgery, President of Dongnae Wooridul Spine Hospital, Busan, South Korea.