IL6 and chronic recurrent multifocal osteomyelitis: Patients with CNO/CRMO exhibited higher serum levels of IL–6, IL–12, eotaxin, macrophage inflammatory protein-1β, regulated on activation, normal T-cell expressed and secreted protein), monocyte chemotactic protein 1, and the soluble IL–2 receptor (IL–2R) when compared to healthy controls.