Allison and Alycia from Silver Spring, Maryland, brought their children, Grace, Sam, Ryan and Emma.
从马里兰银泉来的Allison和Alycia带来了他们的孩子格雷斯、山姆、瑞安和埃玛。
2
Scientists don't know why autism is more common in boys, but they're investigating, says Alycia Halladay, director of environmental research at autism Speaks.