1. Department of Primary Care and Public Health, School of Public Health, Imperial College of London, London, UK/Department of Public Health, Federico II University, Naples, Italy
2. Departments of Medicine and Community Health Sciences, Max Rady College of Medicine, Rady Faculty of Health Sciences, University of Manitoba, Winnipeg, MB, Canada
3. Department of Primary Care and Public Health, School of Public Health, Imperial College of London, London, UK
4. Queen Square Multiple Sclerosis Centre, Department of Neuroinflammation, UCL Queen Square Institute of Neurology, Faculty of Brain Sciences, University College London, London, UK/National Institute for Health Research, University College London Hospitals, Biomedical Research Centre, London, UK