1 Johns Hopkins Bloomberg School of Public Health, National Center for Weight and Wellness, Strategies To Overcome and Prevent (STOP) Obesity Alliance, 1020 19th Street NW, Suite 450, Washington, DC 20036, USA. Electronic address: kahan@gwu.edu.
2 Northwestern University Feinberg School of Medicine, 750 North Lake Shore Drive, Rubloff 9-976, Chicago, IL 60611, USA. Electronic address: rkushner@northwestern.edu.