1. Center for Human Growth and Development, University of Michigan, Ann Arbor, MI 48109, USA
2. Department of Psychology, Ashkelon Academic College, 78109 Ashkelon, Israel
3. Department of Child Health Care, Children’s Hospital Zhejiang University School of Medicine, Hangzhou 310003, China
4. Department of Pediatrics, Peking University First Hospital, Beijing 100034, China
5. Women’s and Children’s Health Center, Peking University, Beijing 100034, China
6. Department of Clinical Laboratory, Peking University First Hospital, Beijing 100034, China
7. Department of Psychology, University of Michigan, Ann Arbor, MI 48109, USA
8. Department of Pediatrics and Communicable Diseases, University of Michigan, Ann Arbor, MI 48109, USA