Published online before print August 8, 2013, doi: 10.3174/ajnr.A3717 AJNR 2013 34: E110-E112 K. Nambaa aCenter for Endovascular Treatment, Division of Neuroendovascular Surgery Jichi Medical University Tochigi-ken, Japan S. Nemotob bDepartment of Endovascular Surgery Tokyo Medical and Dental University Tokyo,