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Song YH, Connor E, Li Y, Zorovich B, Balducci P, Maclaren N.Song YH, et al.Lancet. 1994 Oct 15;344(8929):1049-52. doi: 10.1016/s0140-6736(94)91709-4.Lancet. 1994.PMID: 7934446
Li Y, Song YH, Rais N, Connor E, Schatz D, Muir A, Maclaren N.Li Y, et al.J Clin Invest. 1996 Feb 15;97(4):910-4. doi: 10.1172/JCI118513.J Clin Invest. 1996.PMID: 8613543Free PMC article.