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Cremers FP, van de Pol DJ, Wieringa B, Collins FS, Sankila EM, Siu VM, Flintoff WF, Brunsmann F, Blonden LA, Ropers HH.Cremers FP, et al. Among authors: flintoff wf.Proc Natl Acad Sci U S A. 1989 Oct;86(19):7510-4. doi: 10.1073/pnas.86.19.7510.Proc Natl Acad Sci U S A. 1989.PMID: 2798422Free PMC article.