1. Centre of Mathematics, School of Sciences, University of Minho, Portugal and
Algoritmi Research Center, School of Engineering, University of Minho, Portugal
2. Centre of Mathematics, School of Sciences, University of Minho, Portugal
3. Neurology Department, Hospital da Senhora da Oliveira, Portugal and
Life and Health Sciences Research Institute (ICVS),School of Medicine, University of Minho, Portugal
4. Algoritmi Research Center, School of Engineering, University of Minho, Portugal