Indeed, one recent association study between UGT1A1 and neonatal jaundice in breast-fed Japanese newborns illustrated that heterozygous (TA)7 mutation significantly decreased the risk of hyperbilirubinemia (OR: 0.37; 95%CI: 0.15–0.89; p = 0.027) [15]. The gene discussed is UGT1A1; the disease is Jaundice.