RT Journal Article SR Electronic T1 An inhaled “bifunctional” dual PDE3/4 inhibitor provides additional short-term improvements in lung function compared to existing classes of bronchodilator: implications for future treatment of COPD JF European Respiratory Journal JO Eur Respir J FD European Respiratory Society SP 1801675 DO 10.1183/13993003.01675-2018 VO 52 IS 5 A1 Mario Cazzola A1 Clive Page YR 2018 UL http://erj.ersjournals.com/content/52/5/1801675.abstract AB