Research Article
Not . . . achalasia.
Br Med J (Clin Res Ed) 1984; 288 doi: https://doi.org/10.1136/bmj.288.6411.93 (Published 14 January 1984) Cite this as: Br Med J (Clin Res Ed) 1984;288:93This is a PDF-only article. The first page of the PDF of this article appears above.