Thorax Anand, R, McAuley, D, Blackwood, B, Yap, C, O'Neill, B, Connolly, B, Borthwick, M, Shyamsundar, M, Warburton, J, Meenen, D V, Paulus, F, Schultz, M J, Dark, P & Bradley, J 2020, ' Mucoactive agents for acute respiratory failure in the critically ill: a systematic review and meta-analysis ', Thorax . https://doi.org/10.1136/thoraxjnl-2019-214355 Thorax, 75(8), 623-631. BMJ Publishing Group Anand, R, McAuley, D F, Blackwood, B, Yap, C, ONeill, B, Connolly, B, Borthwick, M, Shyamsundar, M, Warburton, J, Meenen, D V, Paulus, F, Schultz, M J, Dark, P & Bradley, J M 2020, ' Mucoactive agents for acute respiratory failure in the critically ill a systematic review and meta-analysis ', Thorax, pp. 623-631 . https://doi.org/10.1136/thoraxjnl-2019-214355