Funding for this research was provided by:
Received: 11 April 2019
Accepted: 22 October 2019
First Online: 17 December 2019
Ethics approval and consent to participate
: Ethical approval has been granted by the UCL Research Ethics Committee (3546/003 27/09/2017) and by the PUKAR (Partners for Urban Knowledge, Action and Research) Institutional Ethics Committee (25/12/2017). We will secure gatekeeper consent for inclusion of clusters in the trial. Informed signed consent will be obtained by field investigators, after provision and discussion of a participant information sheet.
: No publication will include identifiable data for any participant. Consent for publication is included in the participant informed consent materials.
: The authors declare that they have no competing interests.