The human liver is a vital organ involved in multiple functions. Because susceptibility to liver diseases is highly variable among patients, researchers from Tokyo Medical and Dental University (TMDU) and Cincinnati Children's Hospital Medical Center (CCHMC) have engineered a model liver system that can be personalized for disease modeling and drug discovery.
source https://www.lifetechnology.com/blogs/life-technology-news-blog/3-d-miniature-livers-lead-the-way-to-patient-specific-drug-discovery