1. Faculty of Medicine, Ovidius University of Constanta, Constanta, Romania
2. Pneumology Adults department I, Clinical Pulmonology Hospital of Constanta, Constanta, Romania
3. Department of Pulmonology, Constanta County Clinical Emergency Hospital ‘St. Apostol Andrei’, Constanta, Romania
4. Pneumology Adults department II, Clinical Pulmonology Hospital of Constanta, Constanta, Romania
5. Infectious Diseases Adults department I, Clinical Infectious Diseases Hospital of Constanta, Constanta, Romania
6. Department of Gastroenterology, Constanta County Clinical Emergency Hospital ‘St. Apostol Andrei’, Constanta, Romania
7. Department of Oncology, Constanta County Clinical Emergency Hospital ‘St. Apostol Andrei’, Constanta, Romania