(2015-09-04) Blencowe, Natalie S; Brown, Julia M; Cook, Jonathan A; Metcalfe, Chris; Morton, Dion G; Nicholl, Jon; Sharples, Linda D; Treweek, Shaun; Blazeby, Jane M; Members of the MRC Hub for Trials Methodology Research Network Workshop; University of Aberdeen.Aberdeen Centre for Evaluation; University of Aberdeen.Institute of Applied Health Sciences