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External validation and customization of simplified acute physiology score 3 admission score in Korean intensive care units

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Body mass index and hospital mortality in Korean critically ill patients

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Prevalence and risk factors for reflux esophagitis in patients with chronic obstructive pulmonary disease

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Clinical outcomes and prognostic factors in elderly patients with stage IIIB/IV non-small cell lung cancer

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Curative treatment vs. best supportive care in advanced non small cell lung cancer in aged person