1 From the Department of Public Health (R.P.), University "Federico II" of Naples, Italy; Department of Primary Care and Public Health (R.P.), Imperial College of London, United Kingdom; and Department of Neurology (E.M.M.S.), MS Center Amsterdam, Amsterdam University Medical Centers, Vrije Universiteit Amsterdam, Amsterdam Neuroscience, the Netherlands. r.palladino@imperial.ac.uk.
2 From the Department of Public Health (R.P.), University "Federico II" of Naples, Italy; Department of Primary Care and Public Health (R.P.), Imperial College of London, United Kingdom; and Department of Neurology (E.M.M.S.), MS Center Amsterdam, Amsterdam University Medical Centers, Vrije Universiteit Amsterdam, Amsterdam Neuroscience, the Netherlands.