1. Department of Pathology and Laboratory Medicine, Children’s Hospital Los Angeles, Los Angeles, California, USA
2. Department of Laboratory Medicine, University of Washington, Seattle, Washington, USA
3. Fred Hutchinson Cancer Research Institute, Seattle, Washington, USA
4. Division of Infectious Diseases, Department of Pediatrics, Children’s Hospital Los Angeles, Los Angeles, California, USA
5. Keck School of Medicine at the University of Southern California, Los Angeles, California, USA