Rapid increases in overweight and obesity among South African adolescents: comparison of data from the South African National Youth Risk Behaviour Survey in 2002 and 2008 - Reddy, S P; Resnicow, K; James, S; Funani, I N; Kambaran, N S; Omardien, R G; Masuka, P; Sewpaul, R; Vaughan, R D; MBewu, A (Am J Public Health, 2012)