ULBP2 and endometriosis: In a similar way, when considering all the samples of endometriosis patients and controls, the levels of MICA (median, 0.5 pg/mg; range, 0.0–143.5 vs. median, 0.2 pg/mg; range, 0.0–3.5; P = 0.060), MICB (median, 4.9 pg/mg; range, 0.0–4702 vs. median, 3.4 pg/mg; range, 0.0–20.1; P< 0.001) and ULBP-2 (median, 0.0 pg/mg; range, 0.0–5.2 vs median, 0.0 pg/mg; range, 0.0–4.2; P = 0.014) resulted higher in the endometriosis group than in the control group, although for MICA the differences did not reach statistical significance.