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# Introduction  This article is the second in the TS Research Highlights series \citep*{Richards_2014highlights}. These articles are meant to disseminate recent scientific progress on Gilles de la Tourette Syndrome (TS). During each year, the article will be a work in progress, maintained as a web page on the [Authorea](https://www.authorea.com/aboutus) online authoring platform. After the calendar year ends, the article is finalized and submitted as the annual update for [the Tics channel on F1000Research](http://f1000research.com/channels/tics/about-this-channel) \citep*{25580234}. The working draft for 2016 [appears here](https://www.authorea.com/users/4510/articles/99560/_show_article).