Correspondence
School-headache from Over-study versus Defective Ventilation
Br Med J 1880; 2 doi: https://doi.org/10.1136/bmj.2.1030.530 (Published 25 September 1880) Cite this as: Br Med J 1880;2:530
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.