IL10RB and lupus nephritis: The IL10RB CGA haplotype was more frequent in patients with thrombocytopenia and lupus nephritis than in patients without these manifestations (12.5% vs. 4.3%; p = 0.045 and 13% vs. 4.2%; p = 0.030, respectively), while this haplotype was less frequent in patients with than in patients without arthritis (20% vs. 4.8%; p = 0.008).