Authors: Alexander Komashie; James Ward; Tom Bashford; Terry Dickerson; Gulsum Kubra Kaya; Yuanyuan Liu; Isla Kuhn; Aslι Günay; Katharina Kohler; Nicholas Boddy; Eugenia O'Kelly; Joseph Masters; John Dean; Catherine Meads; P John Clarkson Journal: BMJ Open Date: 2021-01-19 Impact factor: 2.692