Singing for lung health in COPD: a multicentre randomised controlled trial of online delivery oleh William D-C Man, Michael I Polkey, Daisy Fancourt, Winston Banya, Adam Lewis, Nicholas S Hopkinson, Justin L Garner, Keir E J Philip, Matthew J Pavitt, Saeed M Alghamdi, Ali M Alasmari, Edmund Jeffery, Phoene Cave, Adam Lound, Sara C Buttery, Keir Lewis, Karthikan Srikanthan, Sarah Elkin, Sarah Bowen, Christopher M Orton, Abdullah S Alsulayyim, Parris Williams, Bavithra Vijayakumar, James Tonkin, Ahmed Sadaka, Francesca Conway, Alexis Perkins, Ley Chan, Anand Tana