Stem-cell rift shows difficulty obtaining eggs
Wall Street Journal 2005 November 14; p. B1, B3
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Brave new world: Stem-cell researchers make cloned embryos of a living human. Therapy, not reproduction is goal, but firm's step is highly controversial. Reaching the six-cell stage Regalado, Antonio; McGinley, Laurie; Carroll, Jill (2001-11-26)