Author contributions
EAH
EAH and JK conceived the trial, gained funding, and contributed to the study design. CS and MBB provided expert input into the conception of the trial, and MBB and TJ into the study design. LI delivered the intervention, acquired the data, and with JK, JH and CS contributed to interpretation of the work. VR and MBB accessed and verified the underlying data. VR did the statistical analyses, and with MBB, EAH and PM contributed to the analysis of the work and interpretation of data. VR, PM, EAH and MBB wrote the first draft of the article. All authors contributed intellectual content, critically revised the article, and approved the submitted manuscript.