Positive RT-PCR nasopharyngeal swab in patients recovered from COVID-19 disease: When does quarantine really end?. Issue 6 (December 2020) - Landi, Francesco; Gremese, Elisa; Rota, Elisabetta; Carfi', Angelo; Benvenuto, Francesca; Ciciarello, Francesca; Lo Monaco, Maria Rita; Martone, Anna Maria; Pagano, Francesco; Paglionico, Annamaria; Petricca, Luca; Rocchi, Sara; et al.