1. From the Gaubius Laboratory TNO Health and Prevention (G.P.v.N.A., M.A.V., V.W.M.v.H.), Leiden; Division of Cell Biology (S.v.D., J.G.C.), The Netherlands Cancer Institute, Amsterdam; and Institute for Cardiovascular Research (G.P.v.N.A., V.W.M.v.H.), Vrije Universiteit, Amsterdam, the Netherlands.