Stoycheva, Mariana, Mariela Geneva-Popova, Petar Vasilev, Tania Velyanova, Petya Argirova, and Ivan Baltadjiev. 2024. “ASSOCIATION OF CLINICAL PRESENTATION WITH SEVERITY AND OUTCOME OF COVID-19”. PROBLEMS of Infectious and Parasitic Diseases 51 (2): 33-38. https://doi.org/10.58395/b7vrdc10.