資料來源: Google Book

Growing bone

In the new millennium, humans will be traveling to Mars and perhaps beyond with skeletons that respond to microgravity by self-destructing. Meanwhile in Earth's aging populations growing numbers of men and many more women are suffering from crippling bone loss. During the first decade after menopause all women suffer an accelerating loss of bone, which in some of them is severe enough to result in "spontaneous" crushing of vertebrae and fracturing of various bones even by ordinary body movements. This is osteoporosis, which all too often requires prolonged and expensive convalesc.
來源: Google Book
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