Comment on

• Headache types and panic disorder: directionality and specificity.

  Breslau N, Schultz LR, Stewart WF, Lipton R, Welch KM. Breslau N, et al. Neurology. 2001 Feb 13;56(3):350-4. doi: 10.1212/wnl.56.3.350. Neurology. 2001. PMID: 11171900
• The interrelations of migraine, vertigo, and migrainous vertigo.

  Neuhauser H, Leopold M, von Brevern M, Arnold G, Lempert T. Neuhauser H, et al. Neurology. 2001 Feb 27;56(4):436-41. doi: 10.1212/wnl.56.4.436. Neurology. 2001. PMID: 11222783