FIGURE 1. 

From the following article:

Where now for stem-cell cloners?

Erika Check

Nature 438, 1058-1059(22 December 2005)

doi:10.1038/4381058a

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Image credit: W. HOFFMAN, MBBNET, UNIV.MINNESOTA/HTTP://MBBNET.UMN.EDU/SCMAP.HTML

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