1. Medical Center Cologne, Plastic, Reconstructive, Aesthetic and Handsurgery, Clevischer Ring 63, 51063 Cologne, Germany
2. Johanniter-Kliniken Bonn, Department of Plastic, Reconstructive and Aesthetic Surgery, Waldkrankenhaus, Waldstraße 73, 53177 Bonn, Germany
3. Universitätsklinikum Schleswig-Holstein, Division of Plastic and Reconstructive Surgery, Ratzeburger Allee 160, 23538 Lübeck, Germany
4. Medical School Hannover, Department of Plastic, Hand and Reconstructive Surgery, Burn Center, Carl-Neuberg Str.1, 30625 Hannover, Germany
5. Bergmannsheil Buer Gelsenkirchen, Department of Plastic, Aesthetic, and Handsurgery, Burn Center, Schernerweg 4, 45894 Gelsenkirchen, Germany