1. University of Riverside School of Medicine, Riverside, CA, USA
2. College of Osteopathic Medicine of the Pacific, Western University of Health Sciences, Pomona, CA, USA
3. Loma Linda University School of Medicine, Loma Linda, CA, USA
4. Division of Pediatric Infectious Diseases, Department of Pediatrics, Loma Linda University School of Medicine, Loma Linda, CA, USA