Sang-Wook Seo

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BACKGROUND In the 1990s the primary focus of medicine was shifted to disease prevention. Accordingly, it became the responsibility of primary-care physicians to educate and counsel the general population not only on disease prevention specifically but health promotion generally as well. Moreover, it was, and is still today, considered important that(More)
From the endoscopists' point of view, although the main focus of upper gastrointestinal endoscopic examination is the esophagus, stomach, and duodenum (usually bulb and 2nd portion including ampulla of Vater), the portions of the upper airway may also be observed during insertion and withdrawal of the endoscope, such as pharynx and larynx. Thus, a variety(More)
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