Correction: Clinical management of seronegative and seropositive rheumatoid arthritis: A comparative study

The first author's name is spelled incorrectly. The correct name is: Sangtae Choi. The correct citation is: Choi S, Lee K-H (2018) Clinical management of seronegative and seropositive rheumatoid arthritis: A comparative study. PLoS ONE 13(4): e0195550. https://doi.org/10.1371/journal.pone.0195550

The first author, Sangtae Choi, is incorrectly listed as the Corresponding Author. The second author, Kwang-Hoon Lee, is the Corresponding Author. The contact information appears correctly for Kwang-Hoon Lee.

The images for Figs 1 and 2 are incorrectly switched. The image that appears as Fig 1 should be Fig 2, and the image that appears as Fig 2 should be Fig 1. The figure captions appear in the correct order.

Fig 1. Flow diagram of the study design.

Fig 2. Disease activity measures (ESR, CRP, 28TJC, 28SJC and DAS28-ESR) all improved in both groups over the 2 years of treatment with DMARDs.

Box plots for each disease activity measures at baseline, 1 year and 2 years after are displayed for each group (SNRA and SPRA). All the measures improved from baseline on both groups after treatment with DMARDs. DMARD: disease modifying antirheumatic drug, ESR: erythrocyte sedimentation rate, CRP: C-reactive protein, TJC: tender joint count, SJC: swollen joint count, DAS28-ESR: disease activity score 28 ESR.