Polling, Catherine http://orcid.org/0000-0003-2657-0696
Bakolis, Ioannis http://orcid.org/0000-0002-4800-1630
Hotopf, Matthew http://orcid.org/0000-0002-3980-4466
Hatch, Stephani L. http://orcid.org/0000-0001-9103-2427
Funding for this research was provided by:
Wellcome Trust (105757/Z/14/Z)
National Institute for Health Research
Article History
Received: 30 April 2018
Accepted: 18 September 2018
First Online: 26 September 2018
Compliance with ethical standards
:
: On behalf of all authors, the corresponding author states that there is no conflict of interest.
: Research using data within CRIS is covered by a database approval from Oxford REC C (08/H0606/71+5), this project was approved by the CRIS Oversight Committee (Project number 14-026). Linkage of HES data to CRIS was given approval by the NHS Health Research Authority Confidentiality Advisory Group under Section 251 of the NHS Act 2006 in 2011 (Reference ECC 3-04(f)/2011).