Funding for this research was provided by:
NIHR School for Primary Care Research (project no. 331 and 353)
Received: 8 April 2019
Accepted: 20 June 2019
First Online: 25 July 2019
Change Date: 25 January 2020
Change Type: Correction
Change Details: The original article  contains an omitted grant acknowledgement and affiliation as relates to the contribution of co-author, Rafael Perera-Salazar. As such, the following two amendments should apply to the original article:
Ethics approval and consent to participate
: The CPRD’s Independent Scientific Advisory Committee (ISAC) approved this study protocol (protocol number: 18_097).
: Not applicable.
: DMA has received grant funding from Abbvie and the Leo Foundation. MKR has received educational grant support from MSD and Novo Nordisk, has modest stock ownership in GSK and has consulted for Roche. Remaining authors have no competing interests to declare.