[Physical activity has a certain positive effect on the skeleton].

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@article{Zetterberg1990PhysicalAH, title={[Physical activity has a certain positive effect on the skeleton].}, author={Carl Zetterberg and Marie Annerstedt and Muhammed Nordin and Mary Louise Skovron and Joseph D. Zuckerman}, journal={Läkartidningen}, year={1990}, volume={87 42}, pages={3393-5} }