Authors: Myriam Gharbi; Katja Doerholt; Stefania Vergnano; Julia Anna Bielicki; Stéphane Paulus; Esse Menson; Andrew Riordan; Hermione Lyall; Sanjay Valabh Patel; Jolanta Bernatoniene; Ann Versporten; Maggie Heginbothom; Herman Goossens; Mike Sharland Journal: BMJ Open Date: 2016-11-03 Impact factor: 2.692