TY  - GEN
AU  - Mitchell,E A
AU  - Anderson,H R
TI  - Changes in asthma prevalence
SN  - 1468-2044
PY  - 1990///0906
KW  - Asthma
KW  - epidemiology
KW  - Child
KW  - Humans
KW  - Prevalence
KW  - Respiratory Sounds
KW  - United Kingdom
N1  - Publication Type: Letter; Comment
UR  - https://doi.org/10.1136/adc.65.6.646
ER  -