TY  - RPRT
TI  - Physical exercise, endogenous opioids and immune function.
AU  - I H Jonsdottir
AU  - P Hoffmann
AU  - P Thorèn
PY  - 1997
UR  - https://pubmed.ncbi.nlm.nih.gov/9401605/
ID  - 9401605
ER  -