Published on in Vol 2, No 1 (2013): Jan-Jun
1 Musculoskeletal Sciences, Department of Orthopedics, Clinical Sciences Lund, Lund University, Lund, Sweden
2 Centers for Disease Control and Prevention, Atlanta, GA, United States
3 Children's Healthcare of Atlanta, Department of Neuropsychology, Atlanta, GA, United States
4 NORC at the University of Chicago, Chicago, IL, United States
5 Carter Consulting, Inc., Consultant to CDC, Atlanta, GA, United States
*these authors contributed equally