These first few months of 2020 have seen unprecedented developments with the worldwide Coronavirus outbreak and a pandemic crisis. It is with concern that we look toward our authors, reviewers and readers, in Germany and abroad. We hope all of you are staying safe and that you will be able to resume life and work within the near future.
The COVID crisis has an impact on daily life everywhere. One of the many disruptions it caused is the restriction of postal services around the world. After watching declining possibilities of mailing printed copies to an international subscribers list, it was decided that this issue of our Journal will only be published in the online version. We hope to be able to overcome this and other challenges and we strive to adapt to the new circumstances that have to be faced in the future.
Our wish for all of you: keep safe and healthy.