TY  - RPRT
TI  - Beta endorphin: a factor in "fun run" collapse?
AU  - G Dale
AU  - J A Fleetwood
AU  - A Weddell
AU  - R D Ellis
PY  - 1987
DO  - 10.1136/bmj.294.6578.1004
UR  - https://pubmed.ncbi.nlm.nih.gov/2960416/
ID  - 2960416
ER  -