1. Department of Public Health Erasmus MC–University Medical Center Rotterdam, Rotterdam, The Netherlands.
2. Division of Community Health Sciences, Public Health Sciences, University of Edinburgh Medical School, Edinburgh, United Kingdom.
3. Department of Biostatistics and Division of Neurosurgery, Medical College of Virginia, Virginia Commonwealth University, Richmond, Virginia.
4. Department of Neurological Surgery, Erasmus MC–University Medical Center Rotterdam, Rotterdam, The Netherlands.