[1]China Med Univ, China Med Univ Hosp, Dept Med Res, Taichung 40402, Taiwan;
[2]Kaohsiung Med Univ, Grad Inst Med, Coll Med, Kaohsiung, Taiwan;
[3]Chang Gung Mem Hosp, Dept Pediat, Div Allergy Asthma & Rheumatol, Taoyuan, Taiwan;
[4]Natl Hlth Res Inst, Natl Inst Environm Hlth Sci, Miaoli, Taiwan;
[5]Kaohsiung Med Univ, Res Ctr Environm Med, Kaohsiung, Taiwan;
[6]Kaohsiung Med Univ, Ctr Res Resources & Dev, Kaohsiung, Taiwan;
[7]Chang Gung Mem Hosp Keelung, Community Med Res Ctr, Keelung, Taiwan;
[8]Xiamen Chang Gung Hosp, Dept Pediat, Xiamen, Peoples R China;
[9]Johns Hopkins Univ, Sch Med, Baltimore, MD 21218 USA;
[10]Fudan Univ, Key Lab Neonatal Dis, Minist Hlth, Childrens Hosp, Shanghai 201102, Peoples R China;
[11]Fudan Univ, Key Lab Neonatal Dis, Minist Hlth, Inst Biomed Sci, Shanghai 201102, Peoples R China;
[12]Shen Zhen Univ, Lou Hu Hosp, Shenzhen, Peoples R China