Letters
Accuracy of peak flow meters Don't interchange devices
BMJ 1994; 308 doi: https://doi.org/10.1136/bmj.308.6933.917 (Published 02 April 1994) Cite this as: BMJ 1994;308:917
Article 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.