A new report says human embryonic stem cells kept for long periods of time develop changes in their genetic material.
一份新报告指出，长期保存的人类胎儿干细胞，其基因物质会逐渐产生变化。
A new report says human embryonic stem cells kept for long periods of time develop changes in their genetic material.
一份新报告指出，长期保存的人类胎儿干细胞，其基因物质会逐渐产生变化。
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