[1] Seoul Natl Univ, Coll Med, Prevent Med, Seoul, South Korea
[2] Korea Inst Drug Safety & Risk Management, Seoul, South Korea
[3] Seoul Natl Univ, Coll Med, Seoul Natl Univ Hosp, Med Res Collaborating Ctr, Seoul, South Korea
[4] Sungkyunkwan Univ Sch, Kangbuk Samsung Hosp, Occupat & Environm Med, Seoul, South Korea