title: Correction.
abstract: Gu W, Jiang W, He J, et al. Blockade of the brachial plexus abolishes activation of specific brain regions by electroacupuncture at LI4: a functional MRI study. Acupunct Med 2015;33:457–64. On page 2 in the Methods subsection entitled "Experimental protocol", the pulse width should have been stated as 0.5 ms and not 30 ms as published.