There are also questions around the safety and ethics of stem cell treatments which would need to be addressed.

BBC: Deaf gerbils 'hear again' after stem cell cure

And the new research joins numerous previous studies on cell phone radiation that have been unable to definitively prove or disprove cell phones' safety.

CNN: Cell phone exposure increases brain cell activity

For example, how will transplanted human iPS cell derivatives behave in terms of cell fate and safety long-term in clinically relevant transplantation settings in rodents or larger animals that are good models for humans?

FORBES: Scientists Relieved As Supreme Court Passes Over Case Against Embryonic Stem Cell Research