ULBP1 and cervical cancer: This trend of progressively increasing MICA/B, ULBP1, and RAET1E expression corresponded to the phases of cervical cancer progression and was significant according to Spearman’s rank correlation (ρ-value of 0.313 [p < 0.001], 0.285 [p < 0.001], or 0.136 [p < 0.001], respectively).