1.
Poggiali E, Vercelli A, Vadacca GB, Schiavo R, Mazzoni S, Ioannilli E, et al. Negative nasopharyngeal swabs in COVID-19 pneumonia: the experience of an Italian Emergengy Department (Piacenza) during the first month of the Italian epidemic. Acta Biomed [Internet]. 2020 Sep. 7 [cited 2024 Jul. 17];91(3):e2020024. Available from: https://mattioli1885journals.com/index.php/actabiomedica/article/view/9979