1. Departments of Pediatrics and
2. Columbia University School of Nursing, New York;
3. Department of Biostatistics, Columbia University Mailman School of Public Health, New York;
4. Pathology, Columbia University Medical Center, New York;
5. Department of Pediatrics, Weill Cornell Medical College, New York;
6. Christiana Neonatal Associates, Christiana Care Health System, Newark, Delaware;
7. Children’s Hospital of Philadelphia, Philadelphia, Pennsylvania; and
8. Department of Infection Prevention and Control, NewYork-Presbyterian Hospital, New York