1. Division of Pediatric Urology, Astrid Lindgren Children's Hospital, Karolinska University Hospital, Stockholm, Sweden.
2. Laboratory of Wound Healing and Gene Transfer, Division of Plastic Surgery, Harvard Medical School, Brigham and Women's Hospital, Boston, Massachusetts.
3. Klinik für Plastische Chirurgie und Schwerbrandverletzte, BG Universitätskliniken Bergmannsheil, Ruhr Universität Bochum, Bochum, Germany.