Authors: Emily Herrett; Elizabeth Williamson; Kieran Brack; Alexander Perkins; Andrew Thayne; Haleema Shakur-Still; Ian Roberts; Danielle Prowse; Danielle Beaumont; Zahra Jamal; Ben Goldacre; Tjeerd van Staa; Thomas M MacDonald; Jane Armitage; Michael Moore; Maurice Hoffman; Liam Smeeth Journal: Health Technol Assess Date: 2021-03 Impact factor: 4.014