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Borgen E, Naume B, Nesland JM, Nowels KW, Pavlak N, Ravkin I, Goldbard S.Borgen E, et al.Cytometry. 2001 Aug 15;46(4):215-21. doi: 10.1002/cyto.1130.Cytometry. 2001.PMID: 11514954Free article.