†AS, ankylosing spondylitis; RA, reactive arthritis; IBD, inflammatory bowel disease; PA, psoriatic arthritis; NSA, nonspecific arthritis; JIA, juvenile inflammatory arthritis¶At least one month before infliximab therapy‡IMT, Immunomodulatory therapyAST, aspartate aminotransferase; ALT, alanine aminotransferase. The gene discussed is GPT; the disease is inflammatory bowel disease.