From the ∗Department of Epidemiology, UCLA Fielding School of Public Health, Los Angeles, CA
†Department of Social Medicine, National Research Institute for Child Health and Development
‡Department of Clinical Epidemiology and Health Economics, School of Public Health
§Department of Health Services Research, Graduate School of Medicine, The University of Tokyo
∥Division of Allergy, Tokyo Metropolitan Children's Medical Center
¶Department of Health Policy and Informatics, Tokyo Medical and Dental University Graduate School of Medicine, Tokyo, Japan.
Disclosure: The authors declare no conflict of interest.
Reprints: Yusuke Okubo, MD, MPH, National Research Institute for Child Health and Development, 2-10-1 Okura, Setagaya-ku, Tokyo 1578535, Japan (e-mail: [email protected]).