Tourette Syndrome comorbidities

Here's an interesting article about Tourette Syndrome comorbidities, anxiety, and mood disorders: https://www.ucsf.edu/news/2015/03/123666/mood-anxiety-disorders-common-tourette-patients

For those who don't know (since I would have appreciated a definition some years ago), a comorbidity is where one has one or more other conditions in addition to the one at hand.