Raised APRIL and BAFF levels in cerebrospinal fluid of systemic lupus erythematosus (SLE) patients. Cerebrospinal fluid levels of (a) APRIL and (b) BAFF in SLE patients and in healthy controls. APRIL and BAFF levels are expressed in picograms per millilitre. Median values are depicted with a line. *P < 0.05, ***P < 0.001. APRIL, a proliferation-inducing ligand; BAFF, B-cell activating factor of tumour necrosis factor family.
George-Chandy et al. Arthritis Research & Therapy 2008 10:R97 doi:10.1186/ar2484