A hybrid digital parenting programme to prevent abuse of adolescents in Tanzania: study protocol for a pragmatic cluster-randomised controlled trial by Baerecke, L, Ornellas, A, Wamoyi, J, Wambura, M, Klapwijk, J, Chetty, AN, Simpson, A, Janowski, R, de Graaf, K, Stern, D, Clements, L, Te Winkel, E, Christine, L, Mbosoli, G, Nyalali, K, Onduru, OG, Booij, A, Mjwara, SN, Tsoanyane, S, Mshana, G, Mwakitalu, ME, Melendez-Torres, GJ, Calderon, F, Awah, I, Green, O, Vallance, I, Somefun, O, Gardner, F, Sherr, L, Martin, M, Lachman, JM, Cluver, LD