A total of 6 cc of preservative-free 1% lidocaine was used and injected into eight different sites using a 25-gauge, 1-1/2-inch needle at the trapezius muscles bilaterally as well as the levator scapulae, the splenius capitis, and the semispinalis musculature. 
A total of 6 cc of preservative - free 1 % lidocaine was used and injected into eight different sites using a 25 - gauge , 1 - 1/2 - inch needle at the trapezius muscles bilaterally as well as the levator scapulae , the splenius capitis , and the semispinalis musculature .