The validity of duplex ultrasound as a diagnostic modality for internal carotid artery disease Gishel New, Gary S. Roubin, Matthew E. Oetgen, Issam Moussa, Vickram Veeramachaneni, Sriram S. Iyer, Nadim Al-Mubarak, Mariah Ennis, Christina Brennan, Kristin Young, Jennifer Salzberg, Jiri J. Vitek, George Dangas, Martin B. Leon, Jeffrey W. Moses. Lenox Hill Heart and Vascular Institute of New York, New York, NY