About the Authors
Department of Health Policy and Management, Harvard School of Public Health, Boston, Massachusetts, United States of America
Department of Global Health and Population, Harvard School of Public Health, Cambridge, Massachusetts, United States of America
The authors have declared that no competing interests exist.
ICMJE criteria for authorship read and met: MM KB. Agree with the manuscript's results and conclusions: MM KB. Wrote the first draft of the paper: MM. Contributed to the writing of the paper: KB.