1 Instituto de Neurociencias (Universidad Miguel Hernández - Consejo Superior de Investigaciones Científicas), Av. Santiago Ramón y Cajal s/n., Sant Joan d'Alacant 03550, Alicante, Spain. Electronic address: abarco@umh.es.
2 Molecular Cognition Laboratory, Biophysics Institute, CSIC-UPV/EHU, Campus Universidad del País Vasco, Barrio Sarriena s/n, 48940 Leioa, Spain; Ikerbasque, Basque Foundation for Science, Bilbao, Basque Country, Spain; Sagol Department of Neurobiology, Faculty of Natural Sciences, University of Haifa, Haifa, Israel. Electronic address: s.knafo@ikerbasque.org.