Para, Ombretta, Lorenzo Caruso, Caterina Pestelli, Giulia Pestelli, Giacomo Fedi, Stefano Guidi, Alessia Abenante, and Carlo Nozzoli. 2022. “Prognostic Factors for SARS-CoV-2 Nasopharyngeal Swab Negativity: A Multicentric Study”. Italian Journal of Medicine 16 (1). https://doi.org/10.4081/itjm.2022.1552.