1 From the Department of Plastic and Reconstructive Surgery, Hospital Santa Creu i Sant Pau, Barcelona, Spain.
2 Department of Plastic Surgery, Guy's and St Thomas' Hospital, London, United Kingdom.
3 Department of Plastic Surgery, Helsinki University Central Hospital, Helsinki University, Helsinki, Finland.
4 Department of Plastic and Hand Surgery, Institut Gustave Roussy, Villejuif, France.
5 Department of Plastic Surgery, European Institute of Oncology Milano, Milano, Italy.
6 Department of Plastic Surgery, Gent University Hospital, Gent, Belgium.
7 Department of Plastic and Reconstructive Surgery, Division of the Medical School, Universidad Nacional Autónoma de México, Hospital General Dr Manuel Gea González, Mexico City, Mexico.
8 Reconstructive Microsurgery Unit, Careggi University Hospital, Florence, Italy.