1. Department of Pediatrics; University of Oklahoma Health Sciences Center and CMRI Metabolic Research Program; Oklahoma City OK USA
2. Department of Biostatistics; University of Alabama at Birmingham; Birmingham AL USA
3. Nutrition Obesity Research Center; Birmingham AL USA
4. Department of Obstetrics and Gynecology, Division of Maternal Fetal Medicine; University of Oklahoma Health Sciences Center; Oklahoma City OK USA
5. Division of Epidemiology and Community Health; University of Minnesota School of Public Health; Minneapolis MN USA