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Selection of the primary end point in an observational cohort study
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Contributors GG is responsible for the overall content of the article, as well as for submitting and acting as the correspondent. GG, OP-R and UD are equal contributors to the planning, conduct, and reporting of the work described in the article, as well as to the manuscript writing.
Funding The study sponsors have not had any involvement in the study design; in the collection, analysis and interpretation of the data; in the writing of the report; and in the decision to submit the paper for publication.
Competing interests None declared.
Provenance and peer review Commissioned; externally peer reviewed.