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Watson EK, Mayall E, Chapple J, Dalziel M, Harrington K, Williams C, Williamson R.Watson EK, et al. Among authors: williamson r.BMJ. 1991 Aug 31;303(6801):504-7. doi: 10.1136/bmj.303.6801.504.BMJ. 1991.PMID: 1912861Free PMC article.
Wainwright B, Farrall M, Watson E, Williamson R.Wainwright B, et al. Among authors: williamson r.J Med Genet. 1986 Oct;23(5):417-20. doi: 10.1136/jmg.23.5.417.J Med Genet. 1986.PMID: 3783618Free PMC article.