1. Serum levels of interferon-gamma, interleukin-12, and interleukin-18 in biliary atresia
2. Survivin and caspase-3 expression of the liver and biliary tract in biliary atresia
3. Roles of transforming growth factor-beta1 and SMAD3 proteins in biliary atresia
The proposal of the studies will be submitted to the Ethics Committee of the Faculty of Medicine, Chulalongkorn University for approval. All parents of the children will be explained and informed of the purpose of the study. The written informed consents will be obtained.