1 Department of Health, Behavior and Society, Johns Hopkins University, Baltimore, Maryland; Centre for Diet and Activity Research, MRC Epidemiology Unit, University of Cambridge, Cambridge, United Kingdom; and sara.neelon@jhu.edu.
2 Centre for Diet and Activity Research, MRC Epidemiology Unit, University of Cambridge, Cambridge, United Kingdom; and Institute of Child Health, University College London, London, United Kingdom.
3 Centre for Diet and Activity Research, MRC Epidemiology Unit, University of Cambridge, Cambridge, United Kingdom; and.