1. Section of Neonatology, Department of Pediatrics, Baylor College of Medicine, Houston, Texas2Department of Obstetrics and Gynecology, Baylor College of Medicine, Houston, Texas
2. Section of Biostatistics, Department of Pediatrics, University of Arkansas for Medical Sciences, Little Rock
3. Arkansas Research Center, University of Central Arkansas, Conway
4. Health Statistics Branch, Center for Public Health Practice, Arkansas Department of Health, Little Rock
5. Section of Biostatistics, Department of Pediatrics, University of Arkansas for Medical Sciences, Little Rock6currently with Samumed, LLC, San Diego, California
6. Department of Pediatrics, Baylor College of Medicine, Houston, Texas
7. Section of Neonatology, Department of Pediatrics, University of Arkansas for Medical Sciences, Little Rock