TNF and juvenile idiopathic arthritis: Previous studies, however, are generally retrospective or small series of case studies, including 8 patients reported by Sen et al. [32], 6 patients described by Katsicas and Russo [33], 3 patients reported by Foeldvari et al. [12] among 47 patients with JIA-related uveitis treated with anti-TNF-α collected in a multinational survey, and 9 patients reported by Vazquez-Cobian et al. [17].