1. Department of Medicine, Division of Infectious Diseases, Columbia University Irving Medical Center, New York, New York, USA
2. Department of Pediatrics, Columbia University Irving Medical Center, New York, New York, USA
3. Neonatal Center, Beijing Children’s Hospital, Capital Medical University, National Center for Children’s Health, Beijing, China
4. Clinical Microbiology Laboratory, Department of Pathology & Cell Biology, Columbia University Irving Medical Center, New York, New York, USA
5. Department of Infection Prevention and Control, New York-Presbyterian Hospital, New York, New York, USA