Affiliation: | 1. Department of Radiology, Massachusetts General Hospital and Harvard Medical School, Austen2 (222), 55 Fruit Street, Boston, MA 02114, USA;2. Department of Radiology, Massachusetts General Hospital and Harvard Medical School, Gray 2, Neuro-Interventional Radiology, 55, Fruit Street, Boston, MA 02114, USA;3. Department of Radiology, Massachusetts General Hospital and Harvard Medical School, Gray 2 (241K), 55, Fruit Street, Boston, MA 02114, USA |