A review found that, at the time of diagnosis, the average age of the persons affected was 4 years, slightly over half were aged 24 months or younger, and 75% were under 6 years old.
The average age of the persons was 4 years. This was at the time of diagnosis. These persons were affected. A review found this. Slightly over half were aged 24 months. Slightly over half were aged younger.75% were under 6 years old.