How should systematic reviewers handle conference abstracts? A view from the trenches

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Synapse has enriched 5 closely related papers on similar clinical questions. Consider them for comparative context:

1. 1What Have We (Not) Learnt from Millions of Scientific Papers with <i>P</i> Values?2019 · 169 citations
2. 2ClinicalTrials.gov registration can supplement information in abstracts for systematic reviews: a comparison study2013 · 30 citations
3. 3Using ClinicalTrials.gov to Supplement Information in Ophthalmology Conference Abstracts about Trial Outcomes: A Comparison Study2015 · 14 citations
4. 4Comparison of conference abstracts and full‐text publications of randomized controlled trials presented at four consecutive World Congresses of Pain: Reporting quality and agreement of results2018 · 38 citations
5. 5Publication bias: evidence of delayed publication in a cohort study of clinical research projects1997 · 830 citations