The invention features a method for generating new tissue, the method including: obtaining a liquid hydrogel-cell composition including a hydrogel and tissue precursor cells; delivering the liquid hydrogel-cell composition into a permeable, biocompatible support structure; and allowing the liquid hydrogel-cell...http://www.google.com/patents/US6027744?utm_source=gb-gplus-sharePatent US6027744 - Guided development and support of hydrogel-cell compositions