Authors: Wadah Ibrahim; Michael Wilde; Rebecca Cordell; Dahlia Salman; Dorota Ruszkiewicz; Luke Bryant; Matthew Richardson; Robert C Free; Bo Zhao; Ahmed Yousuf; Christobelle White; Richard Russell; Sheila Jones; Bharti Patel; Asia Awal; Rachael Phillips; Graham Fowkes; Teresa McNally; Clare Foxon; Hetan Bhatt; Rosa Peltrini; Amisha Singapuri; Beverley Hargadon; Toru Suzuki; Leong L Ng; Erol Gaillard; Caroline Beardsmore; Kimuli Ryanna; Hitesh Pandya; Tim Coates; Paul S Monks; Neil Greening; Christopher E Brightling; Paul Thomas; Salman Siddiqui Journal: BMJ Open Date: 2019-03-08 Impact factor: 2.692