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Day IN, Haddad L, O'Dell SD, Day LB, Whittall RA, Humphries SE.Day IN, et al. Among authors: humphries se.J Med Genet. 1997 Feb;34(2):111-6. doi: 10.1136/jmg.34.2.111.J Med Genet. 1997.PMID: 9039985Free PMC article.