Steven M. Houser Department of Otolaryngology, Case Western Reserve University, 2500 MetroHealth Dr. MetroHealth Medical Center, Cleveland OH 44109, USA
Silvia Krempaská1, Juraj Kovaľ1 and Marián Švajdler2 1Department of Otolaryngology and Head and Neck Surgery, L. Pasteur University Hospital, Tr.SNP 1, 040 81 Košice, Slovakia; 2Department of Pathology, L. Pasteur University Hospital, Rastislavova 43, 040 81 Košice, Slovakia