More from the article (OpEd?) ...

... As a bioethicist and philosopher who has spent years studying the ethics of using organs grown in animals " including serving on an NIH-funded national working group examining oversight for research on human-animal chimeras " I was perplexed by the decision.

The ban assumed the danger was making pigs too human. Yet regulators now seem comfortable making humans a little more pig.

Why is it considered ethical to put pig organs in humans but not to grow human organs in pigs? ...