Funding for this research was provided by:
Received: 25 September 2017
Accepted: 20 March 2018
First Online: 10 April 2018
Ethics approval and consent to participate
: The study protocol was reviewed and approved by an independent scientific review committee for THIN (reference number), which ensured that data were to be analysed and interpreted appropriately. Data collection for THIN was approved by the South East Multicentre Research Ethics Committee in 2003 and individual studies using THIN data do not require separate ethical approval if only anonymized THIN data is used.
: Not applicable.
: LCS and LAGR work for CEIFE, which has received a research grant from Bayer AG. LAGR has also served as an advisory board member for Bayer AG. MS-G is a salaried, full-time employee of Bayer AG.
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