6. Which is NOT true regarding ultrasound-guided stellate ganglion block
(A) commonly used as the diagnosis and management of sympathetically mediated pain and
vascular insufficiency of head, neck and upper extremity
(B) stellate ganglion could be located over the longus colli muscle at C6 level
(C) left-side esophagus could be found more frequently than right-side esophagus in the sonogram
(D) none of the above