1. Department of Anatomy (X.L., T.S., N.S., A.W., R.S., S.M.), Institute of Biomedicine, University of Turku, FIN-20520 Turku, Finland
2. Department of Physiology (E.N., W.Y., I.H., M.P.), Institute of Biomedicine, University of Turku, FIN-20520 Turku, Finland
3. Unit for Preventive Nutrition (S.M.), Karolinska Institute NOVUM, S-14157 Huddinge, Sweden