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机构:
Samsung Med Ctr, Ctr Clin Epidemiol, Seoul, South Korea
Sungkyunkwan Univ, Samsung Adv Inst Hlth Sci & Technol, Dept Clin Res Design & Evaluat, 81 Irwon Ro, Seoul 06351, South Korea
Johns Hopkins Univ, Dept Epidemiol, Bloomberg Sch Publ Hlth, Baltimore, MD USA Sungkyunkwan Univ, Samsung Med Ctr, Dept Med, Div Pulm & Crit Care Med,Sch Med, Seoul, South Korea