If you are unsure about any of the technical issues or definitions, refer to reliable sources such as the US National Institutes of Health stem cell information.
如果你对于任何技术问题或定义不太确定，请参考可靠的信息来源，诸如美国国立卫生研究院干细胞信息。
If you are unsure about any of the technical issues or definitions, refer to reliable sources such as the US National Institutes of Health stem cell information.
如果你对于任何技术问题或定义不太确定，请参考可靠的信息来源，诸如美国国立卫生研究院干细胞信息。
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