FASTER, PLEASE: Growing Replacement Parts Inside The Patient’s Body. “So far Dr. Grikscheit has concentrated on growing rat, mouse and pig intestinal tissue in laboratory animals. But she has recently had success in growing human intestinal tissue, using donor cells, and is beginning to study how to develop the technique for human patients. There are many hurdles, and human testing is still years away, but she has a surgeon’s confidence that the technique will work.” Like I said, faster, please.