1. Department of Plastic and Reconstructive Surgery, Hospital General Regional ‘‘Dr. Rafael Pascacion Gamboa,'' Chiapas, Mexico
2. Department of Plastic and Reconstructive Surgery ‘‘Dr. Fernando Ortiz Monasterio'', Hospital General de Mexico, Mexico City, Federal District, Mexico
3. Department of Plastic and Reconstructive Surgery, Hospital Militar Dr. Alejandro Dávila Bolaños, Managua, Nicaragua