In South Korea, Ethics Questions Prompt a Stem-Cell Pioneer to Resign a Top Post

One of the world's most prominent stem-cell scientists resigned last month as director of a major new international research consortium, acknowledging that his laboratory had used ethically questionable means of acquiring human egg cells.

The resignation of the scientist, Woo Suk Hwang, who is affiliated with Seoul National University, throws into doubt the future of the consortium, the World Stem Cell Hub, whose establishment had been announced in October. The consortium's goals are

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