1. Department of Biochemistry, Stradiņš University, Riga, Latvia;
2. Latvian State Institute of Wood Chemistry, Riga, Latvia;
3. Institute of Biology and Immunology of Reproduction, Bulgarian Academy of Sciences, Sofia, Bulgaria;
4. Faculty of Veterinary Medicine, University of Forestry, Sofia, Bulgaria;
5. Institute of Neurobiology, Bulgarian Academy of Sciences, Sofia, Bulgaria;
6. Center for Life Nano Science@Sapienza, Istituto Italiano di Tecnologia, Rome, Italy;
7. Department of Chemistry and Technology of Drugs, Sapienza University of Rome, Rome, Italy