1. Chair of Veterinary Biomedicine and Food Hygiene, Estonian University of Life Sciences, 51006 Tartu, Estonia
2. AS Ldiamon, 50411 Tartu, Estonia
3. Institute of Chemistry, University of Tartu, 50411 Tartu, Estonia
4. Department of Photonics, Saint Petersburg Electrotechnical University “LETI”, Saint Petersburg 197022, Russia