DD is a doctoral candidate, supported by an Economic and Social Research Council fellowship, and a consultant physiotherapist in pain; he reports consulting fees from Live Well with Pain and Leva clinic; a grant from the Chartered Society of Physiotherapy; and was a Committee member representing physiotherapy on the National Institute for Health and Care Excellence guideline committee NG193. JW is a clinical academic physiotherapist (facial and inpatient pain) at UCLH National Health Service (NHS) Foundations Trust, an NHS England/National Institute for Health and Care Research post-doctoral bridging fellow, and an honorary research fellow at Interdisciplinary Research in Health Sciences at the University of Oxford; she reports travel support from the Chartered Society of Physiotherapy Charitable Trust and is a past Co-Chair of the Physiotherapy Pain Association.