1. Department of Pediatrics, Division of General Pediatrics and Adolescent Medicine, The University of North Carolina at Chapel Hill, Chapel Hill, NC.
2. Department of Health Policy and Management, The University of North Carolina at Chapel Hill, Chapel Hill, NC.
3. Nutrition Obesity Research Center, University of Alabama at Birmingham, Birmingham, AL.
4. Office of Energetics, University of Alabama at Birmingham, Birmingham, AL.
5. Department of Biostatistics, University of Alabama at Birmingham, Birmingham, AL.