, Khrisna Rangga Permana1,3, Muhammad Faris1,3, Mehmet Zileli4, Nikolay A. Peev51Division of Neuro-Spine, Department of Neurosurgery, Faculty of Medicine - Universitas Airlangga, Surabaya, Indonesia JFIF d d Ducky d qhttp://ns.adobe.com/xap/1.0/