@article {23111,
	title = {Patterns of substance use in South Africa: Results from the South African Stress and Health study},
	journal = {South African Medical Journal},
	volume = {99},
	number = {5},
	year = {2009},
	pages = {358-366},
	author = {van Heerden, M.S. and Grimsrud, A.T. and Seedat, S. and Myer, L. and D.R. Williams and Stein, D.J.}
}
