I give no warranty for correctness, completeness or up-to-dateness of the content of this website. As a German citizen this website is under German law and the disclaimer in German takes precedence over the English version. I give no warranty for the content of external linked pages. If a linked page contains illegal content, please contact me and I will remove the link as soon as possible.


I have no influence on the content of web opages that can be reached by clicking on links on my page. Therefore I give no warranty and take no liability for those pages. I'm not permanently monitoring linked pages. If there is illega l content on those pages, please let me know and I will remove the link.


All content on this page that has been created by me is protected by German copyright. Reproduction, publication and commercial usage is prohibited unless allowed by German laws.

Data Protection

This website does not collect any data. The usage of my contact details that I have to publish as Impressum because of German laws, is strictly prohibited and will be prosecuted in case of spam-mail etc..


Webmaster Dr. Guido Kirsten
e-Mail www@dr-kirsten.de
Address Lukasstrasse 12, 50823 Köln
Phone +49 (0)221 5890846