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These references are in PubMed. This may not be the complete list of references from this article.
- Colley J. R., Holland W. W., Corkhill R. T. Influence of passive smoking and parental phlegm on pneumonia and bronchitis in early childhood. Lancet. 1974 Nov 2;2(7888):1031–1034. doi: 10.1016/s0140-6736(74)92148-5. [DOI] [PubMed] [Google Scholar]


