RT Journal Article SR Electronic T1 Universal use of face masks for success against COVID-19: evidence and implications for prevention policies JF European Respiratory Journal JO Eur Respir J FD European Respiratory Society SP 2001260 DO 10.1183/13993003.01260-2020 VO 55 IS 6 A1 Susanna Esposito A1 Nicola Principi A1 Chi Chi Leung A1 Giovanni Battista Migliori YR 2020 UL http://erj.ersjournals.com/content/55/6/2001260.abstract AB