Tracy L Kolbe-Alexander*, Karin I Proper, Estelle V Lambert, Marieke F van Wier, Julian D Pillay, Craig Nossel, Leegale Adonis and Willem Van Mechelen
* Corresponding author: Tracy L Kolbe-Alexander tracy.kolbe-alexander@uct.ac.za
BMC Public Health 2012, 12:372 doi:10.1186/1471-2458-12-372