TNF and rheumatoid arthritis: Among patients with RA, PSA, or undifferentiated arthritis, epicardial ICIs were observed in 3 (50 %) of 6 patients treated with methotrexate, in the 1 patient (100 %) treated with tumor necrosis factor-α inhibitors in combination with methotrexate, in 3 (100 %) of 3 patients treated with sulfasalazine, in the 1 patient (100 %) treated with hydroxychloroquine, and in 16 (55 %) of 29 patients not currently receiving DMARDs.