Asra Al Fauzi1, Yunus Kuntawi Aji2, Nur Setiawan Suroto1. 1. Neurovascular Division, Department of Neurosurgery, Faculty of Medicine Universitas Airlangga/dr. Soetomo Academic Medical Center Hospital, Surabaya, Indonesia. 2. Neurovascular Division, Department of Neurosurgery, Faculty of Medicine Universitas Airlangga/dr. Soetomo Academic Medical Center Hospital, Surabaya, Indonesia. Electronic address: yunus.neurosurgery@gmail.com.