1. Department of International Health, Johns Hopkins University Bloomberg School of Public Health, Baltimore, Maryland, USA
2. University of Virginia, Charlottesville, Virginia, USA
3. Meilleur Accès aux Soins de Santé, Yaoundé, Cameroon
4. Department of Public Health, Faculty of Medicine and Pharmaceutical Sciences, University of Dschang, Dschang, Cameroon
5. Clinical Research Unit, Division of Health Operations Research, Ministry of Public Health, Yaoundé, Cameroon