A bioRxiv API β Ground truth link from preprint server
B Crossref Relations β Ground truth from publisher metadata
C PubMed/Pre2Pub β Title search + author matching per Langnickel 2022 (4 criteria)
D Cabanac β Crossref search (Cabanac 2021). Hi: Jaccardβ₯0.80. Lo: 0.25β0.80 + ORCID/name match
E Title-only β Fallback, needs manual verification
F Europe PMC β Curated preprint-publication links from Europe PMC
FoC FoC-only flag β DOI flagged by Feet of Clay but not in Retraction Watch (may be EoC, tortured phrases, etc.)
Still Still Cited β Journal article still cites retracted ref(s)
Fixed Corrected β Retracted refs removed from journal article
Pre-prep Before Preprint β Ref retracted before preprint posted
~Prep Around Preprint β Same month as preprint (month-level precision only)
Between Between β Ref retracted between preprint and publication
Ambig Ambiguous β Year-only precision, same year β cannot determine timing
~mo Same Month β Additional marker indicating month-level precision