[1] Seattle Childrens, Pediat Pulmonol, Seattle, WA USA
[2] Seattle Childrens, Core Biostat Epidemiol & Analyt Res, Seattle, WA USA
[3] Boston Childrens, Div Pulm Med, Boston, MA USA
[4] Univ Washington, Sch Publ Hlth, Dept Biostat, Seattle, WA USA
[5] Univ Washington, Sch Publ Hlth, Dept Environm & Occupat Hlth Sci, Seattle, WA USA
[6] Seattle Childrens, Dept Environm & Occupat Hlth Sci, Sch Publ Hlth, Seattle, WA USA
[7] Univ Washington, Env Occ Hlth, Med, Epidemiol, Seattle, WA USA
[8] Univ Washington, Med Ctr, Seattle, WA USA
[9] Seattle Childrens Hosp, Pulm Med, Seattle, WA USA