1. From the Inserm U36 (C.A.B., G.N., J.M.G.), Paris, France; Collège de France (C.A.B., G.N., J.M.G.), Experimental Medicine Unit, Paris, France; Max Delbrück Center for Molecular Medicine (M.B., C.A.B., E.P., R.P.) and Franz Volhard Clinic (D.N.M.), Berlin, Germany; Institute for Physiology (J.P.), University Greifswald, Greifswald, Germany; and Department of Pharmacology (A.H.J.D., I.M.G.), Erasmus MC, Rotterdam, the Netherlands.