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For reports of original research, systematic reviews, and clinical reviews, structured abstracts (abstracts that use section heads) are recommended. Specific advice taken from JAMA’s Instructions for Authors,8 adapted from Haynes et al,9 is given here. Note that Design, Setting, and Patients or Other Participants subsections may be combined, depending on the description. If no intervention was performed, that heading may be omitted. Many journals limit the number of words in abstracts; the JAMA Network journals, for example, allow 350 words for reports of original research and for systematic reviews....