Dobra RA, Boeri M, Elborn S, Kee F, Madge S, Davies JC. Discrete choice experiment (DCE) to quantify the influence of trial features on the decision to participate in cystic fibrosis (CF) clinical trials. BMJ Open. 2021 Mar 2;11(3):e045803. doi: 10.1136/bmjopen-2020-045803