TNF and juvenile idiopathic arthritis: One was a case-control study12 that evaluated the risk of TB in children with JIA in Taiwan, two were retrospective studies4,35 that evaluated the safety of anti-TNFα/biologics in relation to TB, one was a prospective study10 that evaluated TB during treatment with biologic agents in a population vaccinated with bacillus Calmette-Guérin (BCG), and four were case reports.15,22,24,33