1. Loma Linda University School of Medicine Loma Linda California USA
2. San Juan Bautista School of Medicine Caguas Puerto Rico
3. Department of Pediatrics Keck School of Medicine of the University of Southern California Los Angeles California USA
4. Department of Pediatrics Los Angeles County+University of Southern California Medical Center Los Angeles California USA
5. Department of Pediatrics Children's Hospital Los Angeles Los Angeles California USA
6. Department of Pediatrics University of Minnesota Medical School Minneapolis Minnesota USA
7. Department of Pathology Keck School of Medicine of the University of Southern California Los Angeles California USA
8. Department of Pathology and Laboratory Medicine Children's Hospital Los Angeles Los Angeles California USA