1 Centro Nacional de Investigaciones Cardiovasculares Carlos III (CNIC), Madrid, Spain (E.A., A.G., C.Y.-D., J.L., M.J.G., A.B., L.F.d.M., L.G.-C., H.S.-I., M.C.M., A.D., F.S.-C., N.M., I.F.).
2 Institute of Physiology I, Life and Brain Center, University of Bonn, Germany (P.F., B.K.F., M.H.).
3 University of California, Davis (E.C.-T., J.E.L.).
4 IBCS-BIP, Karlsruhe Institute of Technology, Eggenstein-Leopoldshafen, Germany (H.S.-I.).
5 Institute of Anatomy, University of Bern, Switzerland (N.M.).
6 Centro de Biologia Molecular Severo Ochoa, CSIC-UAM, Cantoblanco, Madrid, Spain (I.F.).