“…Among those tests to detect absent CBF, we defended the use of TCD, and a neurophysiologic test battery (multimodality evoked potentials and electroretinography) to show loss of bioelectric activity. 5 Considering the variability of BD guidelines in the United States 1 and the rest of the world, 2 I agree with the authors that the AAN Guidelines should be reviewed, including this diagnosis in children. Furthermore, the World Federation of Neurology should also organize a Committee for reviewing and standardizing guidelines for worldwide consensus in BD diagnostic criteria.…”