1. Ruiz Department of Ophthalmology and Visual Science, The University of Texas Health Science Center–Houston Medical School, Houston
2. Neonatal Intensive Care Unit, Palmetto Health Baptist Medical Center, Columbia, South Carolina3Neonatal Intensive Care Unit, Palmetto Health Richland Medical Center, Columbia, South Carolina
3. Neonatal Intensive Care Unit, Cook Children’s Medical Center, Ft Worth, Texas
4. Neonatal Intensive Care Unit, Huntington Memorial Hospital, Pasadena, California