Steven FJ Callens1
, Faustin Kitetele2
, Patricia Lelo3
, Nicole Shabani3
, Jean Lusiama3
, Okitolanda Wemakoy3
, Robert Colebunders4
, Frieda Behets1
and Annelies Van Rie1 
1School of Public Health, University of North Carolina at Chapel Hill, USA
2Pediatric Hospital Kalembe Lembe, Lingwala, Kinshasa, Democratic Republic of Congo
3School of Public Health, University of Kinshasa, Democratic Republic of Congo
4University of Antwerp, Belgium and Institute of Tropical Medicine, Antwerp, Belgium