About the Authors
Retired (formerly WHO), Crans-Celigny, Vaud, Switzerland
Barcelona Centre for International Health Research (Hospital Clínic, Universitat de Barcelona), Barcelona, Spain
Centro de Investigaçao em Saude da Manhiça, Maputo, Mozambique
The authors have declared that they have no competing interests.
ICMJE criteria for authorship read and met: JAN MGS PLA. Agree with the manuscript's results and conclusions: JAN MGS PLA. Designed the study: JAN PLA. Analyzed the data: JAN PLA. Wrote the first draft of the paper: JAN. Contributed to the writing of the paper: JAN MGS PLA.