In a large Taiwan study, five MTNR1A SNPs (rs13140012, rs6553010, rs2119882, rs13113549, and rs2375801) as well as five MTNR1B SNPs (rs1387153, rs1562444, rs4611171, rs10765576, and rs10830963) were evaluated in patients with hepatocellular carcinoma cancer (HCC). Here, MTNR1A is linked to hepatocellular carcinoma.