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机构:
Samsung Med Ctr, Ctr Clin Epidemiol, Seoul, South Korea
Sungkyunkwan Univ, Dept Clin Res Design & Evaluat, SAIHST, Seoul, South Korea
Johns Hopkins Univ, Dept Epidemiol, Bloomberg Sch Publ Hlth, Baltimore, MD USA
Johns Hopkins Univ, Welch Ctr Prevent Epidemiol & Clin Res, Bloomberg Sch Publ Hlth, Baltimore, MD USA Sungkyunkwan Univ, Div Pulm & Crit Care Med, Dept Med, Samsung Med Ctr,Sch Med, Seoul, South Korea