1. Cassidy JT, Petty RE (eds). Juvenile chronic arthritis. In Textbook of Rheumatology. 2nd ed., New York, Churchill Livingstone, 1990: 113.
2. Arend WP, Dayer J-M. Cytokines and growth factors. In: Kelley WN, Harris ED, Ruddy S, Sledge C. Textbook of Rheumatology. 3rd ed., Philadelphia, WB Saunders CO, 1989: 285.
3. Abbas AK, Lichtman AH, Pober JS (eds). Cytokines. In: Cellular and Molecular Immunology. 2n ed., Philadelphia, WB Saunders Co, 1994: 242.
4. Nouri AME, Panayi GS, Goodman SM. Cytokines and the chronic inflammation of rheumatic disease. The presence of interleukin-1 in synovial fluids. Clin Exp Immunol 1984; 55: 295–302.
5. De Benedetti F, Massa M, Robbinoi P, Ravelli A, Burgio GR, Martini A. Correlations of serum interleukin-6 levels with joint involvement and thrombocytosis in systemic juvenile chronic arthritis. Arthritis Rheum 1991; 34: 1158–63.