1. Children's Nutrition Research Center; Baylor College of Medicine; Houston TX USA
2. Magee-Womens Research Institute; University of Pittsburgh; Pittsburgh PA USA
3. Department of Obstetrics, Gynecology & Reproductive Sciences; University of Pittsburgh; Pittsburgh PA USA
4. Department of Epidemiology; University of Pittsburgh Graduate School of Public Health; Pittsburgh PA USA
5. Department of Radiology; Texas Children's Hospital; Houston TX USA