http://www.nature.co...l/nbt.3413.html
http://www.sciencema...elike-human-ear
from the article:
"When researchers implanted ITOP-generated bone, muscle, and cartilage into rats and mice, the printed materials developed blood supplies and internal structures resembling those of natural tissue. The researchers are currently working with the Food and Drug Administration to set up human trials, with the ultimate goal of creating replacement body parts for people who need them."