[1] Taipei Hosp, Dept Hlth, Dept Pediat, Taipei, Taiwan
[2] China Med Univ, Coll Publ Hlth, Taichung, Taiwan
[3] Natl Taiwan Univ Hosp, Dept Pediat, Taipei, Taiwan
[4] Natl Taiwan Univ Hosp, Dept Environm & Occupat Med, Taipei, Taiwan
[5] Taipei Med Univ, Wan Fang Hosp, Taipei, Taiwan
[6] Natl Taiwan Univ, Inst Occupat Med & Ind Hyg, Coll Publ Hlth, Taipei 10055, Taiwan