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Transnasal ultrathin esophagogastroduodenoscopy (N‐EGD) with less gagging reflexes under non‐sedation is likely suitable for the diagnosis of gastroesophageal reflux disease (GERD), however, N‐EGD might have drawbacks, including its low image resolution. Limited information is available regarding the diagnosability of N‐EGD for GERD. We compared the utility and gagging reflexes of three different...
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