1. Department of Nanostructured Materials, Acad. J. Malinowski Institute of Optical Materials and Technologies (IOMT), Bulgarian Academy of Sciences (BAS), Sofia, Bulgaria
2. Department of Optical Sensors, Central Laboratory of Applied Physics, Bulgarian Academy of Sciences, 61 Sankt Petersburg Blvd, Plovdiv, Bulgaria
3. Department of Virology, National Center of Infectious and Parasitic Diseases, Sofia, Bulgaria
4. Department of Infections Microbiology, The Stephan Angeloff Institute of Microbiology, Bulgarian Academy of Sciences, Sofia, Bulgaria