1. Department of Virology, National Center of Infectious and Parasitic Diseases, Sofia, Bulgaria
2. Department of Composite and Nanostructured Optical Materials, Institute of Optical Materials and Technologies ‘Acad. Jordan Malinowski’, Bulgarian Academy of Sciences, Sofia, Bulgaria
3. Department of Epizootiology and Infectious Diseases of Animals, National Diagnostic and Research Veterinary Medical Institute ‘Prof. Dr. G. Pavlov’, Bulgarian Food Safety Agency, Sofia, Bulgaria
4. Department of Infectious Diseases, Medical University of Sofi[a, Prof. Ivan Kirov Hospital, Sofia, Bulgaria
5. Department of Infectious Diseases, Military Medical Academy, Sofia, Bulgaria
6. Department of Microbiology, Infectious and Parasitic Diseases, Faculty of Veterinary Medicine, Trakia University, Stara Zagora, Bulgaria
7. Unité des Rickettsies, Faculté de Médecine, IHU-Méditerranée Infection, Marseille, France