Authors’ contributions
Not applicableJB led writing the manuscript and was responsible for drafting statistical models and interpreting data. AH and CJ were responsible for final statistical models; RL provided senior statistical oversight. SA and EP were responsible for data collection and data management. MU was grant-holder on PreFIT and responsible for data interpretation and contribution to writing. SEL was Chief Investigator of PreFIT and responsible for original trial design, concept and data interpretation. All authors critically reviewed and contributed to writing of the manuscript. The author(s) read and approved the final manuscript.