1School of Medicine, University of California San Diego, La Jolla, California, USA
2Department of Neurosurgery, University of California San Diego, San Diego, California, USA
3Department of Neurosciences and Pediatrics, University of California San Diego, San Diego, California, USA
Correspondence to Dr John Ross Crawford, [email protected]; accepted October 14, 2014; previously published online January October 27, 2014
Competing interests
None.
Patient consent
Obtained.
Provenance and peer review
Not commissioned; externally peer reviewed.
