About the Authors
Faculty of Social and Political Sciences, University of Cambridge and King's College, Cambridge, United Kingdom
Faculty of Social and Political Sciences, University of Cambridge and Emmanuel College, Cambridge, United Kingdom
Department of Epidemiology and Public Health, Yale University, New Haven, Connecticut, United States of America
The authors have declared that no competing interests exist.
DS formulated the study question and project design and performed the statistical analysis. LPK and SB contributed to the study design and analysis. DS, LPK, and SB contributed to the writing of the manuscript.