1. Department of Plastic and Reconstructive Surgery, Centro Hospitalar S. João, Porto, Portugal;
2. Department of Plastic and Reconstructive Surgery, Faculty of Medicine, University of Porto, Porto, Portugal;
3. Department of Pediatrics, Centro Hospitalar de Vila Nova de Gaia/Espinho, R. Dr. Francisco Sa Carneiro, Vila Nova de Gaia, Portugal, Vila Nova de Gaia, Portugal