<unk>  affects an estimated one in 166,000 to 625,000 children, and is responsible for less than 10% of all cases of long QT syndrome. It has a markedly higher incidence in Norway and Sweden at up to one per 200,000.
Jervell and Lange-Nielsen syndrome
Long QT syndrome
Fox–Fordyce disease
Andersen–Tawil syndrome
Laron syndrome
Cowden syndrome
Koolen–De Vries syndrome
Prader–Willi syndrome