1. Department of Radiology and Biomedical Imaging University of California San Francisco San Francisco California
2. Department of Diagnostic and Interventional Radiology University Hospital Ulm Ulm Germany
3. Department of Diagnostic and Interventional Neuroradiology, School of Medicine, Klinikum rechts der Isar Technical University of Munich Munich Germany
4. TUM‐Neuroimaging Center, Klinikum rechts der Isar Technical University of Munich Munich Germany
5. Department of Orthopaedic Surgery University of California San Francisco San Francisco California USA
6. Department of Epidemiology and Biostatistics University of California San Francisco San Francisco California USA