1 Infectious Disease Unit, Department of General Medicine, Royal Children's Hospital Melbourne, Melbourne, Victoria, Australia; Department of Paediatrics, University of Melbourne, Melbourne, Victoria, Australia.
2 Steven and ALexandra Cohen Children's Medical Center, Northwell Health, Division of Pediatric Infectious Diseases, New Hyde Park, NY, United States; Donald and Barbara Zucker School of Medicine/Hofstra Northwell, New Hempstead, New York, United States. Electronic address: shagmann@northwell.edu.