1 | Department of Infectious Diseases and Hepatology, School of Medicine with the Division of Dentistry in Zabrze, Medical University of Silesia, Katowice, Poland |
2 | Department of Otorhinolaryngology and Oncological Laryngology, School of Medicine with the Division of Dentistry in Zabrze, Medical University of Silesia, Katowice, Poland |
3 | ENT-Clinic – Gaertner-Klinik, Munich, Germany |