Optimising the Delphi survey method during core set development: The impact of summarised feedback on stakeholders’ prioritisation of core data items and consensus - Katy A. Chalmers; Karen Coulman; Jane M. Blazeby; John Dixon; Lilian Kow; Ronald Liem; Dimitri J. Pournaras; Johan Ottosson; Richard Welbourn; Wendy Brown; Kerry N. L. Avery (PLoS ONE, 2026)