Article History
Received: 21 May 2019
Accepted: 7 August 2019
First Online: 21 August 2019
Compliance with ethical guidelines
:
: W. Brinjikji, V. Iyer and G. Lanzino declare that they have no competing interests.
: This article does not contain any studies with human participants or animals performed by any of the authors. Consent was obtained from all patients identifiable from images or other information within the manuscript. In the case of underage patients, consent was obtained from a parent or legal guardian.