Brian Primack at the University of Pittsburgh medical school was the lead author of the new study.

VOA: special.2009.02.11

Kate Strully carried out the study while she was at the Harvard School of Public Health.

VOA: special.2009.06.09

Hassan says her son was doing well at school and had even hoped to study in the United States someday.

VOA: standard.2009.04.22

Another study author,Ned Sahin, a post-doctoral fellow at Harvard University and the UC San Diego School of Medicine, says scientists have suspected for some time that the traditional understanding of the brain needs revision.

VOA: standard.2010.01.28