Comment on

• Nontraumatic subarachnoid hemorrhage in the setting of negative cranial computed tomography results: external validation of a clinical and imaging prediction rule.

  Mark DG, Hung YY, Offerman SR, Rauchwerger AS, Reed ME, Chettipally U, Vinson DR, Ballard DW; Kaiser Permanente CREST Network Investigators. Mark DG, et al. Ann Emerg Med. 2013 Jul;62(1):1-10.e1. doi: 10.1016/j.annemergmed.2012.09.003. Epub 2012 Sep 29. Ann Emerg Med. 2013. PMID: 23026788
• Sensitivity of computed tomography for subarachnoid hemorrhage.

  Schwartz DT. Schwartz DT. Ann Emerg Med. 2013 Oct;62(4):437-8. doi: 10.1016/j.annemergmed.2013.05.035. Ann Emerg Med. 2013. PMID: 24054105 No abstract available.