1. Department of Psychology University of Southern California Los Angeles California USA
2. Department of Psychiatry Columbia University Irving Medical Center New York New York USA
3. Department of Human Development and Quantitative Methodology University of Maryland – College Park College Park Maryland USA
4. Department of Psychological & Brain Sciences University of Iowa Iowa City Iowa USA
5. Avera Research Institute Sioux Falls South Dakota USA
6. Heilbrunn Department of Population and Family Health Columbia University New York New York USA
7. Child Trends Bethesda Maryland USA