Prof Oreffo added: "It is important to realise the ability to retain skeletal stem cell phenotype using surface topography offers a step change in current approaches for stem cell biology.
A systematic long-term change of this kind suggests the action of natural selection and indicates that female skeletal characteristics confer greater fitness. But is this the whole story.
这种长期的系统变化说明自然选择的作用，并表明女性骨骼的特性较大的适应性。但是，情况完全是这样的吗？
3
Smooth muscle tumor and skeletal muscle tumors: There has been no significant change in this group.