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 Tabes dorsalis:

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

"

Tabes dorsalis is caused by demyelination by advanced syphilis infection (tertiary syphilis) when the primary infection by the causative spirochete bacterium, Treponema pallidum, is left untreated for an extended period of time (past the point of blood infection by the organism).[1] The spirochete invades large myelinated fibers, leading to the involvement of the dorsal column medial leminiscus pathway rather than the spinothalamic tract.[citation needed]