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Langstein, J. and Becke, F. M. and Söllner, L. and Krause, G. and Brockhoff, G. and Kreutz, M. and Andreesen, Reinhard and Schwarz, H. (2000) Comparative analysis of CD137 and LPS effects on monocyte activation, survival, and proliferation. Biochemical and biophysical research communications 273 (1), pp. 117-22.
Michel, J. and Langstein, J. and Hofstädter, Ferdinand and Schwarz, H. (1998) A soluble form of CD137 (ILA/4-1BB), a member of the TNF receptor family, is released by activated lymphocytes and is detectable in sera of patients with rheumatoid arthritis. European journal of immunology 28 (1), pp. 290-295.
Langstein, J. and Michel, J. and Fritsche, J. and Kreutz, M. and Andreesen, Reinhard and Schwarz, H. (1998) CD137 (ILA/4-1BB), a member of the TNF receptor family, induces monocyte activation via bidirectional signaling. Journal of immunology (Baltimore, Md. : 1950) 160 (5), pp. 2488-94.