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The online version of the original article can be found at 10.1038/scibx.2008.203
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Nodal; left-right determination factors 1 and 2 (LEFTY1/2). Science-Business eXchange 1, 184 (2008). https://doi.org/10.1038/scibx.2008.184
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DOI: https://doi.org/10.1038/scibx.2008.184