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Contributors AN and HJ contributed equally. They planned, conducted and reported the work described in the article. JH supervised the planning and reporting of this work.
Funding St John’s College, Oxford University, Alumni Fund Special Grant was awarded to AN and HJ. St John’s College, Oxford University, Burke-Knapp Travel Scholarship was awarded to AN. National Institute for Health Research Academic Clinical Fellowship (ACF-2015-18-020) was awarded to JH. The funding organisation had no role in the design or conduct of this research.
Competing interests None declared.
Provenance and peer review Not commissioned; externally peer reviewed.