1. Department of Otolaryngology, Massachusetts Eye and Ear Infirmary, Boston, Massachusetts, USA
2. Pediatric Intensive Care Unit, Massachusetts General Hospital, Boston, Massachusetts, USA
3. Department of Otolaryngology, Roberto Reid Cabral, Santa Domingo, Dominican Republic
4. Department of Otolaryngology, Benjamin Bloom Hospital, San Salvador, El Salvador
5. Hospital de los Valles, Universidad San Francisco de Quito, Quito, Ecuador
6. Massachusetts General Hospital for Children, Boston, Massachusetts, USA
7. Department of Anesthesia, Massachusetts Eye and Ear Infirmary, Boston, Massachusetts, USA
8. Pediatric Airway, Voice and Swallowing Center, Massachusetts General Hospital for Children, Boston, Massachusetts, USA
9. Department of Otolaryngology–Head and Neck Surgery, Eastern Virginia Medical School, Children’s Hospital of the King’s Daughters, Norfolk, Virginia, USA