TY  - RPRT
TI  - [Physical activity has a certain positive effect on the skeleton].
AU  - C Zetterberg
AU  - M Annerstedt
AU  - M Nordin
AU  - M L Skovron
AU  - J Zuckerman
PY  - 1990
UR  - https://pubmed.ncbi.nlm.nih.gov/2233012/
ID  - 2233012
ER  -