PIGG and autoimmune hepatitis: This retrospective multicentre study aimed to compare ELISA-based autoantibody testing and IFT on HEp-2 cells with the gold standard of IFT on rodent tissue sections in children with autoimmune and non-autoimmune liver diseases.<h4>Methods</h4>Autoantibody detection was performed centrally at Hannover Medical School using three commercial antinuclear antibody (ANA) ELISAs, one commercial F-actin ELISA, one in-house pIgG ELISA, and IFT on HEp-2 cells, in comparison to the gold standard of IFT on rodent tissue sections.