After publication of this work [1], it has come to our attention that the following statement was missing from the acknowledgements section:

“The views and opinions expressed therein are those of the authors and do not necessarily reflect those of the HTA, NIHR, NHS or the Department of Health.”

The full acknowledgements section can be found below:

This project was funded by the National Institute for Health Research Health Technology Assessment (NIHR HTA) Programme (project number 10/104/06). Thank you to the trial coordinating staff at the LSHTM CTU. The views and opinions expressed therein are those of the authors and do not necessarily reflect those of the HTA, NIHR, NHS or the Department of Health.