Skin toxicity determined in vitro by three-dimensional, native-state histoculture. March 1991 in “ Proceedings of the National Academy of Sciences ” L N Li, Leonid Margolis, Robert M. Hoffman We don't know much about this study yet. We're maintaining the world's largest resposity of hair loss research. You can help out the community by sending a PDF of this study here . Not sure how to get a study's PDF? You can email the authors of the study. View this study on pnas.org →