1. Institute for Health Services Research in Dermatology and Nursing (IVDP); University Medical Center Hamburg-Eppendorf (UKE); Hamburg Germany
2. Department of Wound Healing, School of Medicine; Cardiff University; Cardiff UK
3. Department of Dermatology, Venereology, Allergology, and Immunology; Dessau Medical Center; Dessau Germany
4. Department of Vascular and Endovascular Surgery; Military Hospital Ulm; Ulm Germany
5. University Heart Center; University Medical Center Hamburg-Eppendorf (UKE); Hamburg Germany