1. Vanderbilt University Medical Center, Department of Pathology, Microbiology and Immunology, Nashville, Tennessee, USA
2. Lifespan Academic Medical Center, Department of Pathology and Laboratory Medicine, Providence, Rhode Island, USA
3. Los Angeles County Department of Public Health, Public Health Laboratories, Los Angeles, California, USA
4. Mayo Clinic College of Medicine and Science, Department of Laboratory Medicine and Pathology, Rochester, Minnesota, USA