Affected populations: The disorder is believed to affect somewhere between 1 in 12,000 and 1 in 24,000 people, although these figures may be underestimated. Many cases of Angelman syndrome can go ...

From her mother’s perspective, Allison Girouard is an activist in her own right. Although it’s not easy for Amy Girouard-Crush’s daughter to communicate, Allison often “speaks out about ...