Financial & competing interests disclosure
MI Johnson’s institution has received research and consultancy funding for work that he has undertaken for GlaxoSmithKline. The authors have no other relevant affiliations or financial involvement with any organization or entity with a financial interest in or financial conflict with the subject matter or materials discussed in the manuscript apart from those disclosed.
No writing assistance was utilized in the production of this manuscript.
Accessing research materials
Underlying materials related to our paper can be accessed by contacting MI Johnson.