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A bold element in the History and etymology section should be a person; it would be useful to have their lifespan details: '<h4>History and etymology</h4> <p>Transverse oesophageal folds were originally described in 1970 by Bremner et al. <sup>5 </sup>as a normal anatomic feature of the cat oesophagus. The term <strong>feline oesophagus</strong> '