1 Department for General, Visceral, Transplant and Thoracic Surgery, Frankfurt University Hospital, Goethe University Frankfurt am Main, Frankfurt am Main 60590, Germany. Electronic address: andreas.schnitzbauer@icloud.com.
2 Department for General, Visceral, Transplant and Thoracic Surgery, Frankfurt University Hospital, Goethe University Frankfurt am Main, Frankfurt am Main 60590, Germany.
3 Institute of Sports Medicine, Goethe University Frankfurt am Main, Frankfurt am Main, Germany; Pain Center, Hospital Landsberg am Lech, Landsberg am Lech, Germany.