Authors: James Richards; Mohammed Hossain; Dominic Summers; Matthew Slater; Matthew Bartlett; Vasilis Kosmoliaptsis; Edward Cf Wilson; Regin Lagaac; Anna Sidders; Claire Foley; Emma Laing; Valerie Hopkins; Chloe Fitzpatrick-Creamer; Cara Hudson; Helen Thomas; Sam Turner; Andrew Tambyraja; Subash Somalanka; James Hunter; Sam Dutta; Sarah Lawman; Tracey Salter; Mohammed Aslam; Atul Bagul; Rajesh Sivaprakasam; George Smith; Zia Moinuddin; Simon Knight; Paul Gibbs; Reza Motallebzadeh; Nicholas Barnett; Gavin Pettigrew Journal: BMJ Open Date: 2019-07-23 Impact factor: 2.692