A Study of the Impact of Hemophilia and Its Treatment on Brain Development, Thinking and Behaviour in Children With Hemophilia

The Hemophilia Growth and Development Study (HGDS) nearly 25 years ago showed haemophilia and HIV impacted brain development, thinking, and behaviour in children and adolescents. The eTHINK study is designed to understand whether advances in hemophilia treatment have removed any impact of hemophilia. If there still is an impact of hemophilia, the eTHINK study will help to identify which children or adolescents are still at risk, and how to screen other children. Participants and their child will participate in a comprehensive assessment of child\'s brain development, thinking and behavior through completing tests and questionnaires. There is only one study visit of 1 to 1.5 hours with no follow-up required