About the Authors

Hubert Barennes

barenneshub@yahoo.fr

Affiliations Institut de la Francophonie pour la Médecine Tropicale, Vientiane, Lao PDR, Epidemiology Unit, Pasteur Institute, Phnom Penh, Cambodia, Agence Nationale de Recherche sur le VIH et les Hépatites, Phnom Penh, Cambodia, ISPED, Centre INSERM U897-Epidemiologie-Biostatistique, Univ. Bordeaux, Bordeaux, France

Amphonexay Frichittavong

Affiliation Institut de la Francophonie pour la Médecine Tropicale, Vientiane, Lao PDR

Marissa Gripenberg

Affiliation Epidemiology Unit, Pasteur Institute, Phnom Penh, Cambodia

Paulin Koffi

Affiliation Institut de la Francophonie pour la Médecine Tropicale, Vientiane, Lao PDR

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: HB AF PK. Performed the experiments: AF. Analyzed the data: HB AF PK MG. Contributed reagents/materials/analysis tools: HB PK. Wrote the paper: HB AF PK MG. Made the primary analysis and wrote the first report: AF PK HB. Conducted the final analysis: HB MG.