1. Center for Curative and Palliative Wound Care, Calvary Hospital, New York, USA
2. Department of Dermatology, Boston University, Boston, USA
3. Department of Surgery, Boston University, Boston, MA, USA
4. Vascular Surgery, Montefiore North Medical Center, Bronx, NY, USA
5. Andriessen Consultants, Malden and UMC St Radboud, Nijmegen, the Netherlands.