Funding for this research was provided by:
Health Services and Delivery Research Programme (13/58/08)
Received: 18 July 2019
Accepted: 10 January 2020
First Online: 28 January 2020
Consent for publication
: Not applicable.
: CS is Director of PrivacyForge Limited. All other authors have declared no support from any organization for the submitted work; no financial relationships with any organizations that might have an interest in the submitted work in the previous three years, no other relationships or activities that could appear to have influenced the submitted work.