Primary study · included by 1 review

Marshall 1992

ProbableThe reviews cited this study without a PMID, DOI or NCT, so it is matched by first author and year. Two different studies by the same author in the same year could be merged here.

Included by

Smoking and oral and pharyngeal cancer: a meta-analysis.

Non-Cochrane · aetiology · 2025 · cited as Marshall 1992 · Supplementary Table S3

The review does not say which of its outcomes this study informs.

1 including review in total.