NRTN and ocular melanoma: In contrast, OM was associated with reduced levels of neurturin (NRTN; OR = 0.961, 95% CI: 0.931–0.991, P = .011), interleukin-2 receptor β (OR = 0.973, 95% CI: 0.948–0.998, P = .032), and interleukin-10 receptor subunit β (OR = 0.970, 95% CI: 0.943–0.998, P = .034).