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Kaplan G, Sampaio EP, Walsh GP, Burkhardt RA, Fajardo TT, Guido LS, de Miranda Machado A, Cellona RV, Abalos RM, Sarno EN, et al.Kaplan G, et al. Among authors: sarno en.Proc Natl Acad Sci U S A. 1989 Aug;86(16):6269-73. doi: 10.1073/pnas.86.16.6269.Proc Natl Acad Sci U S A. 1989.PMID: 2668961Free PMC article.