GGT7 and diabetes mellitus: Nonetheless, polymorphisms rs13041792 of GSS (n = 3,167,810, p = 0.0005) and rs6119534 of GGT7 (n = 1,335,110, p = 0.0002) showed significant associations with an increased body mass index, as a diabetes-related phenotype, in two distinct cohorts of patients, respectively.