An ethics crisis at one of the world's most successful human embryonic stem cell laboratories has plunged the controversial field of research into a new swirl of uncertainty, with U.S. scientists nervously wondering if the scandal will grow into a new wave of political backlash. -
Donor Issue Slows Stem Cell Progress
An ethics crisis at one of the world's most successful human embryonic stem cell laboratories has plunged the controversial field of research into a new swirl of uncertainty, with U.S. scientists nervously wondering if the scandal will grow into a new wave of political backlash.-
By Rick Weiss