An unusual "empty delta sign".
Deus-Silva L, Voetsch B, Nucci A, Maciel JA, Caplan LR.
Deus-Silva L, et al. Among authors: voetsch b.
J Neurol Neurosurg Psychiatry. 2004 Sep;75(9):1287. doi: 10.1136/jnnp.2003.032052.
J Neurol Neurosurg Psychiatry. 2004.
PMID: 15314116
Free PMC article.
No abstract available.