1. Department of Fisheries, Apiculture, Wildlife Management and Special Zoology, University of Zagreb Faculty of Agriculture, Zagreb, Croatia;
2. IsoForensics, Inc., Salt Lake City, UT, USA;
3. National Reference Laboratory for Honey Bee Health, Istituto Zooprofilattico Sperimentale delle Venezie, Legnaro, Padua, Italy;
4. Apismaia, Beekeeping Products & Services, Póvoa de Varzim, Portugal;
5. Diagnostic Services Histopathology and Parasitology Department, Istituto Zooprofilattico Sperimentale delle Venezie, Legnaro, Padua, Italy;
6. Department of Parasitology, Faculty of Veterinary Medicine, University of Namik Kemal, Tekirdag, Turkey;
7. CQ-Chemistry Research Centre, Chemistry Department, University of Tras-os-Montes e Alto Douro, Vila Real, Portugal;
8. Vuippens, Switzerland;
9. Department of Biology, University of Utah, Salt Lake City, UT, USA;
10. Apicultural State Institute (730), University of Hohenheim, Stuttgart, Germany;
11. Apiculture Department, Research Institute of Horticulture, Puławy, Poland;
12. Entomology Department, University of Maryland, College Park, MD, USA