Proceedings from the 2nd Next Gen Therapies for Systemic Juvenile Idiopathic Arthritis and Macrophage Activation Syndrome symposium held on October 3-4, 2019 oleh Scott W. Canna, Grant S. Schulert, Adriana de Jesus, Alex Pickering, Hermine Brunner, Massimo Gadina, Stewart Levine, Raphaela Goldbach-Mansky, Jonathan Boutelle, Rashmi Sinha, Fabrizio DeBenedetti, Alexei Grom, on behalf of the NextGen 2019 Participants