1. Department of Anesthesiology and Critical Care Medicine, Children’s Hospital of Philadelphia and the University of Pennsylvania Perelman School of Medicine, Philadelphia, Pennsylvania, USA
2. Department of Otolaryngology–Head and Neck Surgery, MedStar Georgetown University Hospital, Washington, DC, USA
3. Department of Otolaryngology–Head and Neck Surgery, Lewis Katz School of Medicine at Temple University, Philadelphia, Pennsylvania, USA