1. Department of Information and Communication Technologies, Universitat Pompeu Fabra 1 , Carrer Roc Boronat 138, 08018 Barcelona, Catalonia, Spain
2. Institute for Bioengineering of Catalonia (IBEC), The Barcelona Institute of Science and Technology 2 , Carrer Baldiri Reixac 10-12, 08028 Barcelona, Catalonia, Spain
3. Department of Statistics, Universidad Carlos III de Madrid 3 , Av. de la Universidad 30, 28911 Leganés, Madrid, Spain
4. Mathematics Department, Escuela Politécnica, Universidad de Extremadura 4 , Av. de la Universidad s/n, 10003 Cáceres, Spain
5. Sleep Wake Epilepsy Center, Department of Neurology, Inselspital, Bern University Hospital, University of Bern 5 , Bern 3010, Switzerland