Scientists say that, by bathing the skin cells in extracts of immune cells, that human skin cells in a test tube are made to behave as if they were immune system cells.


that human skin cells in a test tube are made to behave as if they were 

that human skin cells were to behave in a test tube as if they were

human skin cells in a test tube were made to behave as if 

they have made human skin cells in a test tube that were behaving as

 they have made human skin cells in a test tube behave as if they were


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