Associations of TNFAIP3, ETS1 and TNIP1 with systemic lupus erythematosus assessed by stratified analysis. P, patient group with a certain subphenotype; N, patient group without the subphenotype. Number in parentheses is the sample size. Vertical dashed line in each subphenotype panel indicates the cutoff value of statistical significance (P = 0.05).
Zhong et al. Arthritis Research & Therapy 2011 13:R186 doi:10.1186/ar3514