1. Neurology, Cantonal Hospital of Baden Baden Switzerland
2. Faculty of Medicine University of Zurich Zurich Switzerland
3. Johns Hopkins University School of Medicine Department of Neurology Baltimore MD
4. Division of Biostatistics and Bioinformatics, Sidney Kimmel Comprehensive Cancer Center Johns Hopkins University School of Medicine Baltimore MD
5. Johns Hopkins Bloomberg School of Public Health, Department of Biostatistics Baltimore MD
6. Johns Hopkins University School of Medicine, Department of Medicine Baltimore MD
7. University of Illinois College of Medicine Peoria IL
8. Department of Otorhinolaryngology, Head and Neck Surgery lnselspital, Bern University Hospital, University of Bern Bern Switzerland
9. Department of Emergency Medicine, Beth Israel Deaconess Medical Center Boston MA
10. Harvard Medical School Boston MA
11. Johns Hopkins Bloomberg School of Public Health, Department of Epidemiology Baltimore MD