GPT and fibrosis: Regarding laboratory results, ALT, AST, GGT and APRI (aspartate transaminase to platelet ratio index) were significantly higher in the overall fibrosis subgroup whereas platelet counts were significantly lower (Table 1; p < 0.001 for APRI and GGT, p = 0.001 for AST, p = 0.015 for ALT and p = 0.007 for platelets).