1. 1. Ekstrom K, Hjalgrim H, Brandt L, et al. Risk of malignant lymphomas in patients with rheumatoid arthritis and in their first-degree relatives. Arthritis Rheum 48: 963-970, 2003.
2. 2. Gaulard PSS, Harris NL, Jaffe ES, Sundstrom C. Other iatrogenic immunodeficiency-associated lymphoproliferative disorders. In: WHO Classification of Tumours of Haematopoietic and Lymphoid Tissues. Swerdlow SH, Campo E, Harris NL, Jaffe ES, Pileri SA, Eds. IARC Press, Lyon, France, 2008: 350-351.
3. 3. Hoshida Y, Xu JX, Fujita S, et al. Lymphoproliferative disorders in rheumatoid arthritis: clinicopathological analysis of 76 cases in relation to methotrexate medication. J Rheumatol 34: 322-331, 2007.
4. 4. Nakamura S, Ponzoni M, Campo E. Intravascular large B-cell lymphoma. In: WHO Classification of Tumours of Haematopoietic and Lymphoid Tissues. Swerdlow SH, Campo E, Harris NL, Jaffe ES, Pileri SA, et al, Eds. IARC Press, Lyon, France, 2008: 252-253.
5. 5. Shimada K, Kinoshita T, Naoe T, Nakamura S. Presentation and management of intravascular large B-cell lymphoma. Lancet Oncol 10: 895-902, 2009.