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Pereira HA, Spitznagel JK, Winton EF, Shafer WM, Martin LE, Guzman GS, Pohl J, Scott RW, Marra MN, Kinkade JM Jr.Pereira HA, et al. Among authors: shafer wm.Blood. 1990 Aug 15;76(4):825-34.Blood. 1990.PMID: 2200540Free article.
Pereira HA, Shafer WM, Pohl J, Martin LE, Spitznagel JK.Pereira HA, et al. Among authors: shafer wm.J Clin Invest. 1990 May;85(5):1468-76. doi: 10.1172/JCI114593.J Clin Invest. 1990.PMID: 2332502Free PMC article.