Acknowledgments
The authors thank Gunilla Sturrock and Dorothy Shin for reviewing the article.
Declaration of interest
P Spicer and L Runkel are full-time employees at Informa. 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. This includes employment, consultancies, honoraria, stock ownership or options, expert testimony, grants or patents received or pending, or royalties.
Reviewer disclosures
Peer reviewers on this manuscript have no relevant financial or other relationships to disclose