Authors’ contributions {31b}
SD
EDA and JD are the chief investigators. AM, SK, MW, PTG, NW, NK, NA, JRB, GM and DJR are co-investigators. SK is the chief statistician. MS, AMW and RC are trial statisticians. MW is the chief data manager. SM, DC, RG and LA led the study within NHSBT. JS and KS managed the samples collected. SF managed the PPIE input for the trial. AM, EJ and SD coordinated the study and managed the study helpdesk. PH, MB and EA are PPIE members. JA is the independent chair of the Steering Committee. AM, SK, MW and EDA wrote the initial draft of the paper. All members of the writing committee have contributed to the conception, design, and execution of the trial, All co-authors have provided comments on the manuscript and have read and approved the submitted version of this manuscript.