Research Article M.A.O.I. treatment cards. Br Med J 1972; 4 doi: https://doi.org/10.1136/bmj.4.5834.239-d (Published 28 October 1972) Cite this as: Br Med J 1972;4:239 Article Related content Metrics Responses Peer review This article has a correction. Please see:Detecting Sickle Haemoglobin - November 11, 1972 This is a PDF-only article. The first page of the PDF of this article appears below.