1. From the Division of Pediatric Infectious Diseases and Immunology, Burns and Allen Research Institute, Cedars-Sinai Medical Center and David Geffen School of Medicine at UCLA, Los Angeles, CA (S.C., Y.L., T.R.C., W.Z., K.S., D.J.S., M.A.); Department of Pathology, David Geffen School of Medicine at UCLA, Los Angeles, CA (M.F.); Department of Cardiology, Clinic of Internal Medicine I, University Hospital Jena, Jena, Germany (A.Y.); Pediatric Rheumatology, Hospital for Special Surgery, Cornell...