About the Authors

Bruno Marchal

bmarchal@itg.be

Affiliation Department of Public Health, Institute of Tropical Medicine–Antwerp, Antwerp, Belgium

Anna Cavalli

Affiliation Department of Public Health, Institute of Tropical Medicine–Antwerp, Antwerp, Belgium

Guy Kegels

Affiliation Department of Public Health, Institute of Tropical Medicine–Antwerp, Antwerp, Belgium

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

ICMJE criteria for authorship read and met: BM AC GK. Wrote the first draft of the paper: BM. Contributed to the writing of the paper: BM AC GK.