Berghs, Maria
Atkin, Karl
Hatton, Chris
Thomas, Carol
Funding for this research was provided by:
National Institute for Health Research (Public Health Research (PH) 12/182/14))
Article History
Received: 15 November 2018
Accepted: 16 July 2019
First Online: 24 July 2019
Ethics approval and consent to participate
: Not applicable.
: Not applicable.
: The authors declare that they have no competing interests.