CSF2 and plasma cell myeloma: Myeloma light chains from donor C also induced a significant increase in the quantity of GM-CSF released by renal cells in rotating and static spinpods (rotating 188 ± 8 vs. media 46 ± 4 ng/mL, p = 0.00025, W = 0, n1 = n2 = 7; static 139 ± 11 vs. 31 ± 2 ng/mL, p = 0.002, W = 0, n1 = 6, n2 = 5, Fig. 9a).