Leading Articles PRACTICAL PROBLEMS OF LACTATION Br Med J 1939; 1 doi: https://doi.org/10.1136/bmj.1.4074.222 (Published 04 February 1939) Cite this as: Br Med J 1939;1:222 Article Related content Metrics Responses Peer review Related articles Correction Massive intoxication with metoprolol Published: 28 February 1976; Br Med J 1 doi:10.1136/bmj.1.6008.534