[1] Univ Calif Los Angeles, RAND Program Latino Childrens Asthma, Los Angeles, CA 90024 USA
[2] Ctr Dis Control & Prevent, Natl Ctr Hlth Stat, Hyattsville, MD 20782 USA
[3] Med Coll Wisconsin, Milwaukee, WI 53226 USA
[4] Childrens Hosp Wisconsin, Milwaukee, WI 53201 USA
[5] Univ Michigan, Sch Publ Hlth, Ann Arbor, MI 48109 USA