[1] Univ Hosp Udine, Dept Med, Udine, Italy
[2] Ctr Hosp Monkole, Serv Pediat, Kinshasa, DEM REP CONGO
[3] Ctr Format & Appui Sanitaire CEFA, Kinshasa, DEM REP CONGO
[4] Univ Hosp Udine, Inst Hyg & Clin Epidemiol, Udine, Italy
[5] Mediprox Clin, Kinshasa, DEM REP CONGO
[6] Univ Udine, Sch Med, Udine, Italy