Southern Head & Neck Surgery, Alexander City, Alabama, United States
North Alabama ENT, Huntsville, Alabama, United States
East Alabama ENT, Opelika, Alabama, United States
Children's National Medical Center, Washington, District of Columbia, United States
Children's Hospital of Wisconsin, Milwaukee, Wisconsin, United States
IRCCS Burlo-Garofolo, Trieste, Italy
Royal Derby Hospital, Derby, United Kingdom
Queen's Medical Centre, Nottingham, United Kingdom