Data for marketing and optimisation purposes are collected and saved on this website using technology from etracker GmbH ( User profiles will be compiled from these data under a pseudonym. Cookies may be used in this case. Cookies are small text files that are saved locally in a cache on the website user’s internet browser. Cookies allow the internet browser to be recognised on the next visit. You can prevent cookies from being installed by blocking them on your browser software; we would like to point out however that, if necessary, you may not be able to make full use of all the functions of this website in this case. By using this website, you agree to the processing of data collected about you in the manner and for the purpose previously described. Data collected using etracker technology will not be used, without having obtained approval for this purpose from the parties concerned, to ascertain the identity of users of this website and will not be matched to personal data relating to the holder of the pseudonym. Objections to the collection and saving of data can be made at any time by clicking this link.