During this period, the levels of alanine aminotransferase (ALT) and aspartate aminotransferase (AST) were significantly higher in patients with known liver diseases (54.5 ± 45.6 vs. 37.1 ± 28.4, 41.4 ± 27.2 vs. 29.2 ± 24.3, both P-value < 0.05). This evidence concerns the gene GPT and liver disorder.