DRC4 and thyroid gland carcinoma: In addition, a reduced GAS8-AS1 level was found in N1a and N1b (according to the AJCC 7th edition/TNM Classification System for Differentiated Thyroid Carcinoma) (P < 0.001) (Figures 2(d) and 2(e)), while there were no differences between cervical departments (N1a and N1b).