Cells for implantation into a patient are packaged within a barrier of immunoprotective tissue prior to implantation to obviate or minimize rejection of the cells. The preferred immunoprotective tissue for forming the barrier is cartilage. The tissue is formed into a layer that is thin enough...http://www.google.se/patents/US5741685?utm_source=gb-gplus-sharePatent US5741685 - Parenchymal cells packaged in immunoprotective tissue for implantation
