Affiliation: | Academic Medical Center, Amsterdam, the Netherlands (W.R. Faber, H.J.C. de Vries); ;Public Health Service of Amsterdam, Amsterdam (W.R. Faber, H.J.C. de Vries); ;Institute of Tropical Medicine, Antwerp, Belgium (B. de Jong, F. Portaels); ;Flevohospital, Almere, the Netherlands (J.E. Zeegelaar) |