It was nearly a decade in the making, bu..-阿摩線上測驗
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2F 業精於勤,事立於豫 研一下 (2017/04/24)
The Geron team began its work with what is known as a presidential stem-cell line — stem cells derived from discarded in vitro–fertilization embryos that already existed in 2001 when then President Bush decided to prohibit the use of federal funds to pursue human embryonic-stem-cell work. |