1. Chair of Veterinary Biomedicine and Food Hygiene, Institute of Veterinary Medicine and Animal Sciences, Estonian University of Life Sciences, Kreutzwaldi 56/3, 51014 Tartu, Estonia
2. National Centre for Laboratory Research and Risk Assessment, Kreutzwaldi 30, 51006 Tartu, Estonia
3. Food Hygiene and Environmental Health, Faculty of Veterinary Medicine, University of Helsinki, PL 66 (Agnes Sjöbergin katu 2), 00014 Helsinki, Finland