1 | The Maria Skłodowska-Curie Memorial Cancer Center and Institute of Oncology, Department of Cancer Epidemiology and Prevention, Warsaw, Poland |
2 | Medical University of Wroclaw, Department and Clinic of Otolaryngology Head and Neck Surgery, Wroclaw, Poland |
3 | Medical University of Wroclaw, Department of Social Medicine, Wroclaw, Poland |
4 | Institute of Rural Health, Department of Health Promotion, Food and Nutrition, Lublin, Poland |