Juraj Koval
University of P.J. Safarik, Faculty of Medicine, L. Pasteur University Hospital, Department of Otorhinolaryngology Head & Neck Surgery, Kosce, Slovakia
Silvia Krempaská
University of P.J. Safarik, Faculty of Medicine, L. Pasteur University Hospital, Department of Otorhinolaryngology Head & Neck Surgery, Kosce, Slovakia