1. Institute for Clinical and Experimental Surgery, Saarland University, Homburg, Germany.
2. Department of Plastic Surgery and Hand Surgery, University Hospital Zurich, Zurich, Switzerland.
3. Department of Plastic, Reconstructive and Aesthetic Surgery, Ospedale Regionale di Lugano, Ente Ospedaliero Cantonale (EOC), Lugano, Switzerland.
4. Faculty of Biomedical Sciences, Università della Svizzera Italiana, Lugano, Switzerland.