1 Molecular, Cellular and Developmental Biology Unit (MCD), Center of Integrative Biology of Toulouse (CBI), Université de Toulouse, CNRS, UPS, 31000 Toulouse, France. Electronic address: magali.suzanne@univ-tlse3.fr.
2 Cardiovascular Regeneration Program, Centro Nacional de Investigaciones Cardiovasculares (CNIC), Madrid, Spain. Electronic address: mtorres@cnic.es.