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Willis WD, Al-Chaer ED, Quast MJ, Westlund KN.Willis WD, et al.Proc Natl Acad Sci U S A. 1999 Jul 6;96(14):7675-9. doi: 10.1073/pnas.96.14.7675.Proc Natl Acad Sci U S A. 1999.PMID: 10393879Free PMC article.Review.
Feng Y, Cui M, Al-Chaer ED, Willis WD.Feng Y, et al.Anesthesiology. 1998 Aug;89(2):411-20. doi: 10.1097/00000542-199808000-00018.Anesthesiology. 1998.PMID: 9710400Free article.