Jewkes R, Nduna M, Levin J,Jama N, Dunkle K,Khuzwayo N,Koss M, Puren A, Wood K, and Duvury N.(2006) A cluster randomized-controlled trial to determine the effectiveness of Stepping Stones in preventing HIV infections and promoting safer sexual health behavior amongst youth in the rural Eastern Cape, South Africa: trial design, methods and baseline findings. Tropical Medicine and International Health, Vol. 11, No. 1:3-16