The author of this guideline would like to thank the following people for their helpful suggestions and additions, as well as for their proofreading and technical support during publication: Martin Albrecht-Hohmaier, Christian Bracht, Christoph Eggersglüß, Vincent Fröhlich, Melanie Gruß, Sandra Göller, Jörg Heseler, Dietmar Kammerer, Celia Krause, Desiree Mayer, Frodo Podschwadek, Kristina Richts-Matthaei, Kerstin Soltau, Martha Stellmacher and Barbara Wiermann. The English translation was provided by Alessa Hitz.