Citation Hunt

The Wikipedia snippet below is not backed by a reliable source. Can you find one?

Click I got this! to go to Wikipedia and fix the snippet, or Next! to see another one. Good luck!

In page Von Hippel–Lindau disease:

This text has been unreferenced on Wikipedia for a very long time. If you can't find a source, be bold and remove it!

"

VHL disease has an incidence of one in 36,000 births. There is over 90% penetrance by the age of 65.[1] Age at diagnosis varies from infancy to age 60–70 years, with an average patient age at clinical diagnosis of 26 years.[citation needed]