1. Department of Plastic, Hand and MicrosurgerySana Klinikum Hof Hof Germany
2. Department of Plastic and Hand SurgeryUniversity of Erlangen Medical Center Erlangen Germany
3. Department of Internal Medicine 6, Gastrenterology, EndocrinologyKlinikum Nuernberg Nurnberg Germany
4. Institute for Pharmacology and ToxicologyUniversity of Regensburg Regensburg Germany