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Aichele P, Kyburz D, Ohashi PS, Odermatt B, Zinkernagel RM, Hengartner H, Pircher H.Aichele P, et al. Among authors: odermatt b.Proc Natl Acad Sci U S A. 1994 Jan 18;91(2):444-8. doi: 10.1073/pnas.91.2.444.Proc Natl Acad Sci U S A. 1994.PMID: 8290546Free PMC article.