“A High Grade Pleural Based Sarcoma in a Patient With Rheumatoid Arthritis and a 7-Year History of Anti-TNF Alpha Therapy”. Rheumatology Reports 3, no. 1 (November 7, 2011): e13. Accessed June 19, 2025. https://journals.pagepress.org/rr/article/view/rr.2011.e13.