1. Department of Otolaryngology-Head & Neck Surgery; Pediatric Otolaryngology-Head & Neck Surgery (k.p.q.o.), Weill Cornell Medical College; New York New York U.S.A.
2. Department of Department of Otolaryngology-Head & Neck Surgery; Pediatric Otolaryngology-Head & Neck Surgery (k.p.q.o.), University Medical Center Utrecht/Wilhelmina Children's Hospital; Utrecht the Netherlands
3. Hyman Newmann Institute for Neurology and Neurosurgery-Center for Endovascular Surgery (s.p., j.t.f., a.b.), St. Luke's Roosevelt Hospital; New York NY U.S.A.
4. Vascular Birthmark Institute of New York, Department of Otolaryngology (m.w., t.o.), Lenox Hill and Manhattan Eye, Ear, and Throat Hospitals; New York New York U.S.A.
5. Department of Neuroendovascular Therapy; St. Luke's International Hospital; Tokyo Japan