Kaushik P, Solomon DH, Greenberg JD, Anderson JT, Reed G, Pala O, Sumbul-Yuksel B, Kadam P, Kremer JM. Subcutaneous nodules are associated with cardiovascular events in patients with rheumatoid arthritis: results from a large US registry. Clin Rheumatol. 2015 Oct; 34(10):1697-704.