1. Vascular Birthmark Institute of New York at Lenox Hill and Manhattan, Eye, Ear and Throat Hospitals, New York, New York, USA
2. Department of Otolaryngology, NYU Langone Medical Center, New York, New York, USA
3. Endovascular Unit, St Luke’s–Roosevelt Hospital, New York, New York, USA
4. Department of Plastic & Reconstructive Surgery, School of Medicine, Kyungpook National University, Daegu, South Korea