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To understand the developmental mechanism that determines limb size and the consequent limb‐to‐trunk proportions in the tetrapod body, we investigated the role of the paraxial mesoderm in the specification of the limb and flank fields in the chick embryo. We found that the paraxial mesoderm subjacent to the limb field can affect the size of the limb bud along the anterior–posterior and proximal–distal...
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