1. Department of Neurological Surgery, Weill Cornell Medicine, New York Presbyterian Hospital, New York, NY 10021, USA
2. Neurosurgery Unit, Department of Head and Neck Surgery, Garibaldi Hospital, 95123 Catania, Italy
3. Department of Neurosurgery, Gamma Knife and Trauma Center, Cannizzaro Hospital, 95126 Catania, Italy
4. German Cancer Research Center, 69120 Heidelberg, Germany
5. Department of Neurosurgery, King Edward Medical University, Lahore 54000, Pakistan
6. Department of Neurological Sciences, Kokilaben Dhirubhai Ambani Hospital, Mumbai 400053, India
7. Department of Neurosurgery, Neurosurgery Clinic, Birgunj 44300, Nepal