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Woo KC, Anderson JM, Boardman NK, Downton WJ, Osmond CB, Thorne SW.Woo KC, et al. Among authors: osmond cb.Proc Natl Acad Sci U S A. 1970 Sep;67(1):18-25. doi: 10.1073/pnas.67.1.18.Proc Natl Acad Sci U S A. 1970.PMID: 16591853Free PMC article.