1. Institute of Medical Biometry and Epidemiology; University Medical Center Hamburg-Eppendorf; Hamburg Germany
2. Institute of Public Health; University Hospital Heidelberg; Heidelberg Germany
3. Centre de Recherche en Santé de Nouna (CRSN); Nouna Burkina Faso
4. INDEPTH Network; Accra Ghana
5. School of Public Health; University of the Witwatersrand; Johannesburg South Africa
6. Faculty of Public Health; Hanoi Medical School; Hanoi Vietnam
7. ICF International; Rockville MD USA