EGFR gene copy number alteration and mutation are highly variable and scientists have been challenged to define their prognostic significance in triple-negative breast cancer.
EGFR基因拷贝数的改变和突变有很大的差异，科学家试图定义其在三阴性乳腺癌中的预后意义。
Therefore, the dwarf mutation in X. helleri is caused by the developmental defect in spinal column, and the vertebral malformation underlies the body type alteration anatomically.
因而推测，剑尾鱼的侏儒突变是由于脊椎的发育缺陷所致，椎体异常是其体型变化的结构基础。
Therefore, the dwarf mutation in X. helleri is caused by the developmental defect in spinal column, and the vertebral malformation underlies the body type alteration anatomically.
因而推测，剑尾鱼的侏儒突变是由于脊椎的发育缺陷所致，椎体异常是其体型变化的结构基础。
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