1. Centre for Veterinary Sciences, Nicolaus Copernicus University, 87-100 Toruń, Poland
2. Institute of Parasitology, University of Veterinary Medicine Vienna, Veterinärplatz 1, 1210 Vienna, Austria
3. Department of Zoology, Musée National d’Histoire Naturelle, 2160 Luxembourg, Luxembourg
4. Faculty of Chemistry, Georg-August University of Göttingen, 37073 Göttingen, Germany