A copy of this work was available on the public web and has been preserved in the Wayback Machine. The capture dates from 2019; you can also visit the original URL.
The file type is application/pdf.
Gregory J. Zipfel, Manish N. Shah, Daniel Refai, Ralph G. Dacey, Colin P. Derdeyn. "Cranial dural arteriovenous fistulas: modification of angiographic classification scales based on new natural history data." Neurosurgical Focus 26.5 (2009) E14