RT Journal Article SR Electronic T1 False-negative RT-PCR in SARS-CoV-2 disease: experience from an Italian COVID-19 unit JF ERJ Open Research JO erjor FD European Respiratory Society SP 00324-2020 DO 10.1183/23120541.00324-2020 VO 6 IS 2 A1 Di Paolo, Marcello A1 Iacovelli, Alessandra A1 Olmati, Federica A1 Menichini, Ilaria A1 Oliva, Alessandra A1 Carnevalini, Martina A1 Graziani, Elda A1 Mastroianni, Claudio Maria A1 Palange, Paolo YR 2020 UL http://openres.ersjournals.com/content/6/2/00324-2020.abstract AB