Funding for this research was provided by:
Health Services and Delivery Research Programme (13/59/26)
Programme Development Grants (RP-DG-1213-10003)
National Institute for Health Research (NIHR- BRC-1215-20008)
Text and Data Mining valid from 2018-05-14
Received: 9 January 2018
Accepted: 5 April 2018
First Online: 14 May 2018
Ethics approval and consent to participate
: Ethical approval for the VOCAL study was obtained from City Road and Hampstead NHS Research Ethics Committee (14/LO/1883) and subsequent amendments. Approval for SCALS sub-studies was from Camden and Kings Cross (15/LO/0482), Camden & Islington (13/LO/1610) and South Central (Berkshire; 15/SC/0553) NHS research ethics committees and from research ethics committees at the University of Birmingham (ERN_11–0598), and University of Oxford (MS-IDREC-C1–2015-227) and subsequent amendments. All participants gave written informed consent.
: The authors declare that they have no competing interests.
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