Letters
Asthma trends Causes of wheeze and asthma may differ
BMJ 1994; 309 doi: https://doi.org/10.1136/bmj.309.6954.603 (Published 03 September 1994) Cite this as: BMJ 1994;309:603Article usage
Article metrics provide readers and authors with an indication of how often a specific article has been accessed month by month. It counts three formats - abstract/extract, full text and pdf. The page is updated each day.