RT Journal Article SR Electronic T1 The worldwide assessment of separation of patients from ventilatory assistance (WEAN SAFE) ERS Clinical Research Collaboration JF European Respiratory Journal JO Eur Respir J FD European Respiratory Society SP 1802228 DO 10.1183/13993003.02228-2018 VO 53 IS 3 A1 Leo Heunks A1 Giacomo Bellani A1 Tài Pham A1 Laurent Brochard A1 John G. Laffey YR 2019 UL http://erj.ersjournals.com/content/53/3/1802228.abstract AB