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Instrumental variable estimation of a hazard ratio for treatment with a waiting time without specifying its dependence on unmeasured confounders: application to a procedural registry

Crossref DOI link: https://doi.org/10.1007/s10985-026-09706-0

Published Online: 2026-04-29

Published Print: 2026-06

Update policy: https://doi.org/10.1007/springer_crossmark_policy

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