1. Department for Anesthesiology, Center for Interdisciplinary Pain Medicine, University Hospital of Würzburg, Würzburg, Germany.
2. Institute for Inorganic Chemistry and Julius Maximilians University Würzburg, Würzburg, Germany.
3. Institute of Pharmacology and Toxicology, Julius Maximilians University Würzburg, Würzburg, Germany.
4. Department of Anesthesiology and Pain Medicine, Tongji Hospital of Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China.
5. Institute for Physical and Theoretical Chemistry and Julius Maximilians University Würzburg, Würzburg, Germany.
6. Institute for Pharmacy and Food Chemistry, Julius Maximilians University Würzburg, Würzburg, Germany.