[1] Univ Sao Paulo, Sch Med, Environm Epidemiol Study Grp, Lab Expt Air Pollut, Sao Paulo, Brazil
[2] Catholic Univ Santos, Collect Hlth POS Grad Program, Sao Paulo, Brazil
[3] Univ Sao Paulo, Med Sch Clin Hosp, Childrens Inst, Pain & Palliat Care Unit, Sao Paulo, Brazil
[4] Univ Sao Paulo, Med Sch Clin Hosp, Childrens Inst, Emergency Care Unit, Sao Paulo, Brazil
[5] ABC, Fac Med, Dept Community Hlth, Santo Andre, Brazil
[6] Harvard Sch Publ Hlth, Exposure Epidemiol & Risk Program, Boston, MA USA