Barium swallow and ultrasound in diagnosis of gastro-oesophageal reflux in childrenBr Med J (Clin Res Ed) 1985; 291 doi: https://doi.org/10.1136/bmj.291.6492.411-c (Published 10 August 1985) Cite this as: Br Med J (Clin Res Ed) 1985;291:411
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