Data from: Changes in bone mass and size and their relation to sex steroid levels in healthy young to middle-aged men: a prospective cohort study.

Dataset accompanying the article: Changes in bone mass and size and their relation to sex steroid levels in healthy young to middle-aged men: a prospective cohort study.随该研究论文一同发布的数据集：《健康年轻至中年男性的骨量与骨尺寸变化及其与性激素水平的关联：一项前瞻性队列研究（prospective cohort study）》