3.7. Increased Liver Expression of mRNA for Fork-Head Winged Helix Transcription Factor P3 and Tissue Inhibitor of Matrix Metalloproteinase-1 and Decline in the Liver Expression of Interleukin-1 Beta and Matrix Metalloproteinase-2 in the Biliary Atresia Children as Compared to the Control Group. This evidence concerns the gene MMP1 and biliary atresia.