Funding for this research was provided by:
Programme Grants for Applied Research (Reference Number RP-PG-0216-20004)
Horizon 2020 (733206)
British Heart Foundation
Received: 2 April 2020
Accepted: 30 November 2020
First Online: 4 January 2021
Ethics approval and consent to participate
: N/A as systematic review of published literature.
: All authors consent to publication of the manuscript, figures, tables and supplementary material.
: KWT, MH and HI are directors of LifeLab, a non-profit intervention at the University of Southampton and Southampton University Hospital, both registered charitable organizations. All other authors declare no conflicts of interest. The proposal for this review was registered with PROSPERO (ID: CRD42016053477).