Faculty of Medicine, Universitas Indonesia, Jakarta, Indonesia; RSUPN Dr. Cipto Mangukusumo, Neurosurgery Department, Jakarta, Indonesia; Egelsbacher Str. 20, Erzhausen, 64390, Germany
Freisleben, H.-J., Faculty of Medicine, Universitas Indonesia, Jakarta, Indonesia; Tandian, D., RSUPN Dr. Cipto Mangukusumo, Neurosurgery Department, Jakarta, Indonesia; Kuebel-Thiel, K., Egelsbacher Str. 20, Erzhausen, 64390, Germany