1 BG Kliniken Group of Hospitals, BG Klinikum Unfallkrankenhaus Berlin gGmH, Warener Str. 7, 12683 Berlin, Germany. Electronic address: dirk.stengel@ukb.de.
2 BG Kliniken Group of Hospitals, BG Klinikum Unfallkrankenhaus Berlin gGmH, Warener Str. 7, 12683 Berlin, Germany.