The Paris criteria facilitate diagnosis by requiring at least two features from each disease across three domains: biochemical (ALP ≥ 2× upper limit of normal for PBC; ALT ≥ 5× upper limit of normal for AIH), serological (AMA‐positivity for PBC; ANA/ASMA for AIH), and histological (florid duct lesion for PBC; interface hepatitis for AIH) [12]. This evidence concerns the gene GPT and primary biliary cholangitis.