- Heterogeneity of proliferative responses of human B cell precursor acute lymphoblastic leukemia (BCP-ALL) cells to interleukin 7 (IL-7): no correlation with immunoglobulin gene status and expression of IL-7 receptor or IL-2/IL-4/IL-7 receptor common gamma chain genes. Smiers, F.J., van Paassen, M., Pouwels, K., Beishuizen, A., Hählen, K., Löwenberg, B., Touw, I.P. Leukemia (1995)