1. Jhpiego; MCHIP Maternal and Child Health Integrated Program; Maputo; Mozambique
2. International Centre for Reproductive Health; Ghent University; De Pintelaan 185 P3; 9000 Ghent; Belgium
3. Interuniversity Institute for Biostatistics and Statistical Bioinformatics (I-BioStat); Hasselt University, Agoralaan 1; B-3590 Diepenbeek; Belgium