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Kaplan AH, Swanstrom R.Kaplan AH, et al.Proc Natl Acad Sci U S A. 1991 May 15;88(10):4528-32. doi: 10.1073/pnas.88.10.4528.Proc Natl Acad Sci U S A. 1991.PMID: 2034693Free PMC article.
Kaplan AH, Michael SF, Wehbie RS, Knigge MF, Paul DA, Everitt L, Kempf DJ, Norbeck DW, Erickson JW, Swanstrom R.Kaplan AH, et al.Proc Natl Acad Sci U S A. 1994 Jun 7;91(12):5597-601. doi: 10.1073/pnas.91.12.5597.Proc Natl Acad Sci U S A. 1994.PMID: 8202533Free PMC article.