TY  - RPRT
TI  - Physical activity and asthma.
AU  - C J Clark
AU  - L M Cochrane
PY  - 1999
DO  - 10.1097/00063198-199901000-00012
UR  - https://pubmed.ncbi.nlm.nih.gov/10813253/
ID  - 10813253
ER  -