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Richters CD, Burger CW, van de Loosdrecht AA, van Rijswijk RE, Calame W, Bleker OP, Vermorken JB, Kenemans P, Beelen RH.Richters CD, et al. Among authors: beelen rh.Cancer Lett. 1993 Jan 15;68(1):25-31. doi: 10.1016/0304-3835(93)90215-u.Cancer Lett. 1993.PMID: 8422646