Birkeland Peter, Høgedal Lisbeth, Poulsen Frantz
King's College Hospital, Department of Neurosurgery, London SE5 9RS, UK Department of Neurosurgery, Odense University Hospital, Odense, Denmark.
Department of Radiology, Odense University Hospital.
BMJ. 2015 Sep 25;351:h5014. doi: 10.1136/bmj.h5014.