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AntSc: anterior scalene; SCM: sternocleidomastoid muscle; ATTP: anterior transverse process; PTTP: posterior transverse process; LCo: longus colli muscle; ITA: inferior thyroid artery; IJV: internal jugular vein; CA: carotid artery; SG: location for stellate block; Thy: thyroid; Es: esophagus; VB C6: C-6 vertebral body.
