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Von Hoegen, I. and Falk, Werner and Kojouharoff, G. and Krammer, P. H. (1989) Internalization of interleukin 1 (IL 1) correlates with IL 1-induced IL 2 receptor expression and IL 2 secretion of EL4 thymoma cells. European journal of immunology 19 (2), pp. 329-334.