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 Marcello Di Paolo A1 Alessandra Iacovelli A1 Federica Olmati A1 Ilaria Menichini A1 Alessandra Oliva A1 Martina Carnevalini A1 Elda Graziani A1 Claudio Maria Mastroianni A1 Paolo Palange YR 2020 UL http://openres.ersjournals.com/content/6/2/00324-2020.abstract AB