SLC31A2 and Wilson disease: Our results showed a much higher SLC31A2 c.86C > T frequency in our WD cohort (6/191, 0.0314) than in East Asian (0.0024 in gnomAD database, P < 0.0001, test for one proportion) or worldwide (0.0002 in gnomAD database, P < 0.0001, test for one proportion) populations.