Co‐existence of Gastrointestinal Vascular Malformations in Patients With Congenital Head/neck and Thoracic Vascular Malformations and Vascular Birthmarks: 531. (October 2015) - Chatterjee, Kshitij; Klair, Jagpal Singh; Girotra, Mohit; Kaur, Aneet; Aduli, Farshad