The prevalence and CT appearance of the levator claviculae muscle: a normal variant not to be mistaken for an abnormality.
Rubinstein D, Escott EJ, Hendrick LL. The prevalence and CT appearance of the levator claviculae muscle: a normal variant not to be mistaken for an abnormality. AJNR Am J Neuroradiol. 1999 Apr; 20(4):583-6.