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aCentre Médical de Macenta, Mission Philafricaine, Conakry, Guinea bINSERM U897 -
Centre Inserm Epidémiologie et Biostatistique, Université de Bordeaux cUniversité
de Bordeaux, ISPED, Centre INSERM U897-Epidemiologie-Biostatistique, Bordeaux, France
dDepartment of Infectious Diseases, University Hospital Bern eInstitute of Social
and Preventive Medicine, University of Bern, Bern, Switzerland fDepartment of Infectious
Diseases, University of Dakar, Senegal.