1. Department of Oncology with Laboratory of Molecular Oncology, Military Institute of Medicine, Szaserow 128, 04–141 Warsaw, Poland
2. First Faculty of Medicine, Medical University of Warsaw, Zwirki i Wigury 61, 02-091 Warsaw, Poland
3. Department of Otolaryngology, Czerniakowski Hospital, Medical University of Warsaw, Stepinska 19/25, 00-739 Warsaw, Poland