Socioeconomic inequalities in risk factors for non communicable diseases in low-income and middle-income countries: results from the World Health Survey.
A.R. Hosseinpoor, N. Bergen, A. Kunst, **S. Harper**, R. Guthold, D. Rekve, E.T. d'Espaignet, N. Naidoo, S. Chatterji
January 2012