1. Institute of Diagnostic Radiology, Pauls Stradiņš Clinical University Hospital, Riga, Latvia
2. Faculty of Medicine, Riga Stradiņš University, Riga, Latvia
3. Department of Radiology, University of Latvia, Riga, Latvia
4. Department of Neurosurgery, Pauls Stradiņš Clinical University Hospital, Riga, Latvia
5. Nuclear Medicine Clinic, ARS, Riga, Latvia
6. Department of Pathology, Riga Stradiņš University Hospital, Riga, Latvia