1. Biomedical Engineering Group, University of Valladolid, Paseo de Belén, 15, 47011 Valladolid; Spain
2. Imaging Processing Laboratory; University of Valladolid, Paseo de Belén, 15, 47011 Valladolid; Spain
3. Psychiatry Department, School of Medicine; University of Valladolid, Av. Ramón y Cajal, 7; Valladolid 47005 Spain
4. Psychiatry Service, Clinical Hospital of Valladolid, Ramón y Cajal, 3; Valladolid 47003 Spain
5. Neurosciences Institute of Castilla y León (INCYL), Pintor Fernando Gallego, 1, 37007 University of Salamanca; 37007 Salamanca Spain
6. IMUVA, Mathematics Research Institute, University of Valladolid; Valladolid Spain