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BMC Neurology > 2016 > 16 > 1 > 1-8
European Journal of Neurology > 19 > 6 > 847 - 854
Journal of Clinical Epidemiology > 2011 > 64 > 6 > 675-686
BMC Neurology > 2016 > 16 > 1 > 1-8
European Journal of Neurology > 19 > 6 > 847 - 854
Journal of Clinical Epidemiology > 2011 > 64 > 6 > 675-686