RT Journal Article SR Electronic T1 Inhaled corticosteroids and COVID-19: a systematic review and clinical perspective JF European Respiratory Journal JO Eur Respir J FD European Respiratory Society SP 2001009 DO 10.1183/13993003.01009-2020 VO 55 IS 5 A1 Halpin, David M.G. A1 Singh, Dave A1 Hadfield, Ruth M. YR 2020 UL http://erj.ersjournals.com/content/55/5/2001009.abstract AB