1 Department of Neurology, University Hospital Würzburg, 97080 Würzburg, Germany; Clinical Research Group Resolve PAIN, University Hospital Würzburg, 97080 Würzburg, Germany. Electronic address: sommer@uni-wuerzburg.de.
2 Centre for Interdisciplinary Pain Medicine, Department of Anaesthesiology, Intensive Care, Emergency, and Pain Medicine, University Hospital Würzburg, 97080 Würzburg, Germany; Clinical Research Group Resolve PAIN, University Hospital Würzburg, 97080 Würzburg, Germany.