AJ directed the implementation of the HPAI longitudinal study.
YLS directed the implementation of the method, contributed to the statistical supervision, and revised the manuscript.
AMK directed the implementation of the study and was the principal author of the paper.
Policy makers may also be involved in directing the implementation of interventions.
EFE: designed the clinical trial, procured funding for the study, directed the implementation of the trial, and revised the draft.
MIH wrote the grant application, directed the implementation of the study protocol, and had overall responsibility for the research.
JMW guided the study design, directed the implementation of the study, drafted portions of the manuscript, and critically reviewed the text.
WS and MIH wrote the grant application, directed the implementation of the study protocol, and had overall responsibility for the research.
WAS and MIH wrote the grant application, directed the implementation of the study protocol, and had overall responsibility for the research.
SS directed the implementation of the study, drafted the first version of the manuscript and was the principal author of the paper.
