Sonja Merten*, Christian Schaetti, Cele Manianga, Bruno Lapika, Claire-Lise Chaignat, Raymond Hutubessy and Mitchell G Weiss
* Corresponding author: Sonja Merten sonja.merten@unibas.ch
BMC Public Health 2013, 13:60 doi:10.1186/1471-2458-13-60