TY - JOUR AU - Lovell, D J; Reiff, A; Jones, O Y TI - Long-term safety and efficacy of etanercept in children with polyarticular-course juvenile rheumatoid arthritis JO - Arthritis Rheum VL - 54 PY - 2006 DO - 10.1002/art.21885 SP - 1987 EP - 1994 N1 - et al. ER -