About the Authors

Fabian Rohner

fabian@groundworkhealth.org

Affiliation GroundWork LLC, Crans-près-Céligny, Switzerland

Marcelline O. Kangambèga

Affiliation Laboratoire National de Santé Publique, Ouagadougou, Burkina Faso

Noor Khan

Affiliation The Micronutrient Initiative, Ottawa, Canada

Robert Kargougou

Affiliation UNICEF, Ouagadougou, Burkina Faso

Denis Garnier

Affiliation UNICEF, Ouagadougou, Burkina Faso

Ibrahima Sanou

Affiliation Laboratoire National de Santé Publique, Ouagadougou, Burkina Faso

Bertine D. Ouaro

Affiliation Direction de la Nutrition, Ministère de Santé, Ouagadougou, Burkina Faso

Nicolai Petry

Affiliation GroundWork LLC, Crans-près-Céligny, Switzerland

James P. Wirth

Affiliation GroundWork LLC, Crans-près-Céligny, Switzerland

Pieter Jooste

Affiliations Iodine Global Network South Africa, Cape Town, South Africa, Centre of Excellence for Nutrition, North-West University, Potchefstroom, South Africa

Competing Interests

FR published a validation report on one of the devices included in this manuscript; NK is affiliated with the Micronutrient Initiative, which provided funds for the study. FR, NP and JPW are employed by GroundWork LLC and these authors hereby confirm they have no competing interests relating to employment, consultancy, patents, products in development or marketed products to declare. This does not alter the authors' adherence to all the PLOS ONE policies on sharing data and materials.

Author Contributions

Conceived and designed the experiments: FR MOK NK RK DG BDO PJ. Performed the experiments: FR MOK RK IS. Analyzed the data: FR NP JPW PJ. Contributed reagents/materials/analysis tools: FR MOK NK RK IS BDO. Wrote the paper: FR MOK NK RK DG IS BDO NP JPW PJ.