A strategy to discover new organizers identifies a putative heart organizer

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Viktor Hamburger, Howard L. Hamilton · Journal of Morphology · 1951 · 12.3K citations

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A versatile vector for gene and oligonucleotide transfer into cells in culture and in vivo: polyethylenimine.

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Evidence for an Expansion-Based Temporal Shh Gradient in Specifying Vertebrate Digit Identities

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