Harrold LR, Reed GW, Karki C, Magner R, Shewade A, John A, Kremer JM, Greenberg JD. Risk of Infection Associated With Subsequent Biologic Agent Use After Rituximab: Results From a National Rheumatoid Arthritis Patient Registry. Arthritis Care Res (Hoboken). 2016 12; 68(12):1888-1893.