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The text should include the full name, academic degrees, and a single institutional affiliation for each author and the email address for the corresponding author. Research Letters may have no more than 7 authors. Online supplementary material is only allowed for brief additional and absolutely necessary methods but not for any additional results or discussion. These should not exceed 600 words of text and 6 references and may include up to 2 tables or figures. Research Letters are concise, focused reports of original research. Maximum length: 3000 words of text (not including abstract, tables, figures, acknowledgments, references, and online-only material) with no more than a total of 5 tables and/or figures. A list of 3 Key Points is required (see guidance on preparing Key Points). Follow EQUATOR Reporting Guidelines.Ī structured abstract is required for more information, see instructions for preparing Abstracts for Reports of Original Data. Data included in research reports must be original and should be as timely and current as possible (see Timeliness of Data). Each manuscript should clearly state an objective or hypothesis the design and methods (including the study type and setting and dates, patients or participants with inclusion and exclusion criteria and/or participation or response rates, or data sources, and how these were selected for the study) the essential features of any interventions the main outcome measures the main results of the study a discussion section placing the results in context with the published literature and addressing study limitations and the conclusions and relevant implications for clinical practice or health policy.
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These reports typically include randomized trials (see Clinical Trial), intervention studies, cohort studies, case-control studies, epidemiologic assessments, and other observational studies.
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Manuscript Preparation and Submission Requirements.Systematic Review (Without Meta-analysis).