1. Veterinary Helminthology Unit; Department of Biomedical Sciences; Institute of Tropical Medicine; Antwerp Belgium
2. Medical Helminthology Unit, Department of Biomedical Sciences; Institute of Tropical Medicine; Antwerp Belgium
3. Eurovet Animal Health BV; Bladel The Netherlands
4. Biomolecular Mass Spectrometry Unit; Department of Parasitology; Leiden University Medical Center; Leiden The Netherlands