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Prospective observational cohort study on grading the severity of postoperative complications in global surgery research
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The surgical safety checklist and patient outcomes after surgery : a prospective observational cohort study, systematic review and meta-analysis
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Critical care admission following elective surgery was not associated with survival benefit : prospective analysis of data from 27 countries
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In-hospital clinical outcomes after upper gastrointestinal surgery : data from an international observational study