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Reddy VB, Kowal-Vern A, Hoppensteadt DA, Kumar A, Walenga JM, Fareed J, Schumacher HR.Reddy VB, et al. Among authors: schumacher hr.Am J Clin Pathol. 1990 Oct;94(4):397-403. doi: 10.1093/ajcp/94.4.397.Am J Clin Pathol. 1990.PMID: 2220667
Kowal-Vern A, Cotelingam J, Schumacher HR.Kowal-Vern A, et al. Among authors: schumacher hr.Am J Clin Pathol. 1992 Jul;98(1):34-40. doi: 10.1093/ajcp/98.1.34.Am J Clin Pathol. 1992.PMID: 1615923
Stark EW, Garvin DF, Surana RB, Dale NL, Hummer W, Clark M, Schumacher HR.Stark EW, et al. Among authors: schumacher hr.Am J Clin Pathol. 1985 Oct;84(4):551-4. doi: 10.1093/ajcp/84.4.551.Am J Clin Pathol. 1985.PMID: 3862338