1. From the Department of Epidemiology and Biostatistics, Erasmus Medical Center, Rotterdam (I.M. vd M., A.E.H., A.I. d S.; D.A.M. vd K., R.L.G.N., A.H., J.C.M.W.); Gaubius Laboratory, TNO-PG, Leiden (I.M. vd M., M.P.M. d M.); and Numico Research, Wageningen (A.J.K.), the Netherlands.