RT Journal Article SR Electronic T1 Global burden of COVID-19 pandemic on healthcare workers JF ERJ Open Research JO erjor FD European Respiratory Society SP 00195-2020 DO 10.1183/23120541.00195-2020 VO 6 IS 2 A1 Eleni Papoutsi A1 Vassilis G. Giannakoulis A1 Vasiliki Ntella A1 Sofia Pappa A1 Paraskevi Katsaounou YR 2020 UL http://openres.ersjournals.com/content/6/2/00195-2020.abstract AB