1. Department of Internal Medicine (R.P.P., H.v.T., E.K., T.J.V.), Erasmus University Medical Center, Rotterdam, The Netherlands;
2. Laboratory of Comparative Endocrinology, Zoological Institute (S.v.d.G., V.M.D.), B-3000 Leuven, Belgium
3. Department of Intensive Care Medicine (P.J.W., G.V.d.B.), Katholieke Universiteit Leuven, B-3000 Leuven, Belgium