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The first section of this article (BMJ 2026;392:r2673, doi:10.1136/bmj.r2673, published 9 January 2026) has been rewritten to correct two inaccuracies. The original article stated that the nutritional product NutriHope was used for children when in fact it is only used for adults. We also stated that MSF measure only upper arm circumference when it should be mid upper arm circumference and oedema