[1] Colorado State Univ, Dept Environm & Radiol Hlth Sci, Ft Collins, CO USA
[2] Univ Calif Berkeley, Sch Publ Hlth, Div Environm Hlth Sci, Berkeley, CA USA
[3] Colorado Dept Publ Hlth & Environm, Div Dis Control & Publ Hlth Response, Denver, CO USA
[4] Univ Calif San Francisco, Dept Med, San Francisco, CA USA
[5] Univ Calif San Francisco, Dept Med, Fresno, CA USA
[6] Cent Calif Asthma Collaborat, Fresno, CA USA
[7] Stanford Univ, Sean N Parker Ctr Allergy & Asthma Res, Palo Alto, CA USA
[8] Harvard TH Chan Sch Publ Hlth, Dept Environm Hlth, Boston, MA USA
[9] Sonoma Technol, Petaluma, CA USA
[10] 1681 Campus Delivery, Ft Collins, CO 80523 USA