Prof. Wilmut said the understanding of the genetics of the disease is lacking, as is the extent to which various nerve cell types are affected. There are no effective treatments. The Roslin hopes to collaborate with the Institute of Psychiatry in London to develop normal and diseased nerve cell lines so the effects of the disease can be pinned down exactly. The Roslin Institute, home of Dolly the sheep, is turning its attention to humans. Inside an unimpressive low-rise building just outside Edinburgh, a medical revolution has started. After two decades doing related work with pigs, sheep and other livestock, Roslin has built up a major programme on human stem cells, cells that have the potential to be turned into any other type to repair a damaged body.