Researchers have long envisioned that stem cells could be used to repair or replace damaged tissues. This research field is known as regenerative medicine. "Pluripotent" embryonic stem cells have high expectations from regenerative medical scientists. The so-called "pluripotent" means These stem cells can differentiate into a variety of other cell types, and current technology can already induce pluripotency in non-embryonic cells, thus bypassing the ethical controversy that arises when using embryonic cells directly. What's the author least likely to tell next? ['Significance of cell pluripotency research.', 'Origin of the name of regenerative medicine.', 'New results of cell pluripotency research.', 'Ethical controversy in the field of regenerative medicine.']