1 Department of Dental Medicine, Faculty of Medicine, Slovak Medical University, Bratislava, Slovakia.
2 Department of Ophthalmology, Faculty of Medicine, Slovak Medical University, Bratislava, Slovakia.
3 Laboratory of Apidology and Apitherapy, Department of Microbial Genetics, Institute of Molecular Biology, Slovak Academy of Sciences, Bratislava, Slovakia.
4 Department of Microbiology, Faculty of Medicine, Slovak Medical University, Bratislava, Slovakia.