GPT and common variable immunodeficiency: Crescenzi et al. demonstrated elevated liver stiffness of at least moderate fibrosis in 33.8% of their CVID cohort, and that liver stiffness correlated with serum alkaline phosphatase (ALP), gamma glutamyl-transferase (GGT), longitudinal spleen length but not serum aspartate aminotransferase (AST)/alanine transaminase (ALT) [36].