We use Google AdWords. AdWords is an online advertising program of Google Inc, 1600 Amphi- theatre Parkway, Mountain View, CA 94043, United States (“Google”). In the context of Google AdWords we use the so-called conversion tracking. When you click on an ad placed by Google, a cookie will be set for the conversion tracking. Cookies are small text files that the Internet browser places on the user’s computer. These cookies lose their validity after 30 days and are not used to identify users. If the user visits certain pages of this website and the cookie has not yet expired, Google and we can recognize that the user has clicked on the ad and has been redirected to this page. Each Google AdWords customer gets a different cookie. The cookies can not be tracked over websites of AdWords customers.