1. Dr Gernot Walder GmbH; Außervillgraten Austria
2. Department of Medical Statistics, Informatics and Health Economics
3. Department of Parasitology; Institute of Zoology; Faculty of Biology; University of Warsaw; Warsaw Poland
4. Service for Hygiene and Public Health; Bozen Italy
5. Research Centre for Agriculture and Forestry Laimburg; Pfatten Italy
6. Central Institute for Blood Transfusion and Immunology; University Clinics Innsbruck; Innsbruck Austria
7. Department of Hygiene; Medical Microbiology and Social Medicine; Innsbruck Medical University; Innsbruck Austria
8. Institute of Parasitology; Department of Pathophylsiology; University of Veterinary Medicine; Vienna Austria
9. Veterinary Faculty; Comparative Tropical Medicine and Parasitology; Munich Germany