1 Department of Plastic and Reconstructive Surgery, Helsinki University and Helsinki University Hospital, Finland. Electronic address: pia.heino@hus.fi.
2 Department of Plastic and Reconstructive Surgery, Helsinki University and Helsinki University Hospital and Helsinki Burn Centre, Finland.
3 Department of Gastroenterological Surgery, Helsinki University and Helsinki University Hospital, Finland.
4 Department of Plastic and Reconstructive Surgery, Helsinki University and Helsinki University Hospital, Finland.