Eotaxin protein levels of cell supernatants. Eotaxin protein was measured by ELISA in supernatants of fibroblasts after stimulation with 30 ng/mL TNF- or cocultivation with the Hodgkin cell lines (L1236, L428, and KM-H2) and the pre-B–cell line (Blin-1). Errors are shown as the standard deviation.