1 | 4th Department of Infectious Diseases, Hospital for Infectious Diseases, Warsaw, Poland |
2 | Faculty of Medicine, Collegium Medicum, Cardinal Stefan Wyszyński University, Warsaw, Poland |
3 | Department of Epidemiology and Tropical Medicine, Military Institute of Medicine, Warsaw, Poland |
4 | Department of Tropical Medicine and Epidemiology, Medical University / Institute of Maritime and Tropical Medicine, Gdańsk, Poland |