Affiliation: | a Department of Medicine, University of California, San Francisco, Calif b Center for Tobacco Control Research and Education, University of California, San Francisco, Calif c Departments of Medicine and Pediatrics, Case Western Reserve University, Cleveland, Ohio d Allergy/Immunology Associates, Inc, Cleveland, Ohio e Department of Epidemiology and Biostatistics, University of California, San Francisco, Calif f Children's Hospital and Research Center Oakland, Oakland, Calif g Department of Pediatrics, Section of Pulmonology, Baylor College of Medicine and Texas Children's Hospital, Houston, Tex h Department of Preventive Medicine, Keck School of Medicine, University of Southern California, Los Angeles, Calif i Children's Memorial Hospital and the Feinberg School of Medicine, Northwestern University, Chicago, Ill j Division of Allergy-Immunology, Feinberg School of Medicine, Northwestern University, Chicago, Ill k Department of Allergy & Immunology, Kaiser Permanente-Vallejo Medical Center, Vallejo, Calif l Instituto Nacional de Enfermedades Respiratorias (INER), Mexico City, Mexico m Department of Epidemiology, Johns Hopkins Bloomberg School of Public Health, Baltimore, Md n Bay Area Pediatrics, Oakland, Calif o Sonoma Technology, Inc, Petaluma, Calif p Pediatric Pulmonary Division, Jacobi Medical Center, Bronx, NY q Department of Pediatrics, University of California, San Francisco, Calif r Veterans Caribbean Health Care System, San Juan, Puerto Rico s Centro de Neumologia Pediatrica, San Juan, Puerto Rico t Center for Health Services Research, Henry Ford Health System, Detroit, Mich u Department of Internal Medicine, Henry Ford Health System, Detroit, Mich v Department of Health Sciences, Graduate Program in Public Health, Lehman College, City University of New York, Bronx, NY |