Do Won Choi

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BACKGROUND It has been reported that there are four zones of distinct venous patterns around the gastroesophageal junction (GEJ); i.e. truncal, perforating, palisade (PZ) and gastric zones. Using the distal end of PZ as a marker for GEJ, this study was done to assess the length and patterns of PZ in Koreans, and to assess the prevalence of endoscopic(More)
BACKGROUND/AIMS Long-term efficacy and the rate of viral breakthrough in patients with HBeAg- negative chronic hepatitis B receiving lamivudine therapy is uncertain. This study was conducted to determine the rate of viral breakthrough according to the HBeAg status and the relation of viral breakthrough with YMDD mutants. METHODS Two hundred and five(More)
In this paper, we design a wideband RF pulse generator. Fig. 1 shows a schematic diagram of the RF pulse generator. It is comprised of a high-voltage charging system, a spark-gap switch, and a fat dipole antenna. Since the antenna and the spark gap switch are united, the source may be compact and robust. Marx generator is used as high-voltage charging(More)
BACKGROUND/AIMS Pseudoaneurysm is a life-threatening complication of chronic or acute pancreatitis. This study was undertaken to evaluate the clinical features of pseudoaneurysm complicating pancreatitis. METHODS We reviewed the medical records of 7 patients diagnosed as pseudoaneurysms with chronic pancreatitis in Korea University Guro and Anam Hospital(More)
BACKGROUND/AIMS Long-term lamivudine therapy can induce the emergence of lamivudine resistant hepatitis B virus (HBV) mutants. Clinically emergence of the mutant is expressed by the reappearance of disappeared HBV DNA in serum. Continued lamivudine treatment has been usually recommended in cases of viral breakthrough. However, the clinical outcome in(More)
There has been an increase in the number of patients treated with pegylated interferon (PEG-IFN) and ribavirin due to the better antiviral efficacy. The main serious adverse events of PEG-IFN plus ribavirin combination therapy are bone marrow suppression and hemolytic anemia. However, there are few reports of vasculitis occurring during PEG-IFN therapy. We(More)
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