RT Journal Article SR Electronic T1 COVID-19 and Smoking. Is Nicotine the Hidden Link? JF European Respiratory Journal JO Eur Respir J FD European Respiratory Society SP 2001116 DO 10.1183/13993003.01116-2020 A1 Patrizia Russo A1 Stefano Bonassi A1 Robertina Giacconi A1 Marco Malavolta A1 Carlo Tomino A1 Fabrizio Maggi YR 2020 UL http://erj.ersjournals.com/content/early/2020/04/20/13993003.01116-2020.abstract AB