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Dworetzky SI, Wright KL, Fey EG, Penman S, Lian JB, Stein JL, Stein GS.Dworetzky SI, et al. Among authors: stein jl, stein gs.Proc Natl Acad Sci U S A. 1992 May 1;89(9):4178-82. doi: 10.1073/pnas.89.9.4178.Proc Natl Acad Sci U S A. 1992.PMID: 1570345Free PMC article.