1. Faculty of Medicine, Universitas Padjadjaran, Bandung 40161, West Java, Indonesia
2. Department of Surgery, Faculty of Medicine, Pelita Harapan University, Tangerang 15811, Banten, Indonesia
3. Department of Surgery, Oncology, Head and Neck Division, Hasan Sadikin Hospital, Bandung 40161, West Java, Indonesia
4. Department of Anesthesiology and Intensive Care, Universitas Padjadjaran, Bandung 40161, West Java, Indonesia
5. Department of Neurosurgery, Faculty of Medicine, Pelita Harapan University, Tangerang 15811, Banten, Indonesia
6. Department of Anatomical Pathology, Universitas Padjadjaran, Bandung 40161, West Java, Indonesia