HOTAIR and non-Hodgkin lymphoma: The finding revealed that rs1899663 variant of HOTAIR gene significantly decreased the risk of NHL in codominant (OR = 0.22, 95% CI = 0.13–0.36, p < 0.001, GT vs GG), dominant (OR = 0.25, 95% CI = 0.15–0.41, p < 0.0001, GT+TT vs GG), overdominant (OR = 0.30, 95% CI = 0.19– 0.46, p < 0.0001, GT vs GG+TT) and allelic (OR = 0.66, 95% CI = 0.49–0.88, p =0.005, T vs G) inheritance models.