| Authors: |
Williamson E; London School of Hygiene and Tropical Medicine, London, United Kingdom, elizabeth.williamson@lshtm.ac.uk., Bhaskaran K; London School of Hygiene and Tropical Medicine, London, United Kingdom, elizabeth.williamson@lshtm.ac.uk., Walker A; The DataLab, Nuffield Department of Primary Care Health Sciences, University of Oxford, Oxford, United Kingdom., Smeeth L; London School of Hygiene and Tropical Medicine, NIHR Health Protection Research Unit in Immunisation, London, United Kingdom., Goldacre B; The DataLab, Nuffield Department of Primary Care Health Sciences, University of Oxford Oxford, United Kingdom. |