Research Article A fifth freedom? Br Med J 1965; 2 doi: https://doi.org/10.1136/bmj.2.5471.1141 (Published 13 November 1965) Cite this as: Br Med J 1965;2:1141 Article Related content Metrics Responses Peer review This article has a correction. Please see:Correction: Cymag powder: ANY QUESTIONS? - November 11, 1978 This is a PDF-only article. The first page of the PDF of this article appears below.