Symptomatic aortitis at giant cell arteritis diagnosis: a prognostic factor of aortic event oleh Olivier Espitia, Gauthier Blonz, Geoffrey Urbanski, Cédric Landron, Jérôme Connault, Christian Lavigne, Pascal Roblot, François Maillot, Alexandra Audemard-Verger, Mathieu Artifoni, Cécile Durant, Béatrice Guyomarch, Mohamed Hamidou, Julie Magnant, Christian Agard, French Study Group for Large Vessel Vasculitis (GEFA)