1 Neurology Department, Centro Hospitalar de Entre Douro e Vouga, Santa Maria da Feira, Portugal. [email protected].
2 Departamento de Ciências da Saúde Pública e Forenses e Educação Médica Faculdade de Medicina da Universidade do Porto, Porto, Portugal. [email protected].
3 EPIUnit, Institute of Public Health, University of Porto, Rua das Taipas 135-139, 4050-600, Porto, Portugal. [email protected].
4 Neurology Department, Centro Hospitalar de Entre Douro e Vouga, Santa Maria da Feira, Portugal.
5 Departamento de Ciências da Saúde Pública e Forenses e Educação Médica Faculdade de Medicina da Universidade do Porto, Porto, Portugal.
6 EPIUnit, Institute of Public Health, University of Porto, Rua das Taipas 135-139, 4050-600, Porto, Portugal.
7 2CA Braga, Braga, Portugal.
8 Life andHealth Sciences Research Institute (ICVS), School of Health Sciences, University of Minho, Braga, Portugal.
9 ICVS/3B's - PT Government Associate Laboratory, Guimarães, Braga, Portugal.
10 Department NEUROFARBA, Section Neurosciences, University of Florence, Florence, Italy.
11 IRCCS Fondazione Don Carlo Gnocchi, Florence, Italy.
12 Neurology Department, Hospital Pedro Hispano, Unidade Local de, Saúde de Matosinhos, Sra. da Hora, Portugal.
The above article was published online with an error in author name's affiliations. Affiliation 8 has to be added to Maria Pia Amato and has to be deleted from Vitor Tedim.