Genetic Collection Protocol is a study where researchers collect blood or spit samples from people and their parents. These samples contain DNA, which is like a body's instruction manual. Scientists will store the samples to help understand liver diseases better. If you or your child were in studies like PROBE, BASIC, LOGIC, or MITOHEP, you might be able to join. The samples are kept safely at the National Institute of Diabetes and Digestive and Kidney Diseases (NIDDK). The study aims to learn more about how liver diseases work and what happens over time.

• The study only requires one visit to give your sample.
• You must have been part of a previous ChiLDReN study.
• There is no treatment or compensation offered for participation.

You can't join if the child or parent doesn't fit the rules, like if the child passed away or if they can't be contacted. Participation is voluntary, and the samples help in future studies to improve health care for liver diseases.