Competing interests: The authors declare the following other interests: MU is a director and shareholder of Clinvivo, which provides electronic data collection for health services research. He is part of an academic partnership with Serco, funded by the European Social Fund, related to return to work initiatives. He is a co-investigator on three National Institute for Health Research funded studies receiving additional support from Stryker, outside the scope of this editorial. The BMJ policy on financial interests is here: https://www.bmj.com/sites/default/files/attachments/resources/2016/03/16-current-bmj-education-coi-form.pdf."