[1] Univ Antwerp Hosp, Inst Trop Med, Natl Str 155, B-2000 Antwerp, Belgium
[2] Med Frontieres, B-1090 Brussels, Belgium
[3] Minist Hlth, Gombe, DEM REP CONGO
[4] Okimo Hosp, Watsa, DEM REP CONGO
[5] WHO, Gombe, DEM REP CONGO
[6] Natl Inst Biomed Res, Kinshasa, DEM REP CONGO