How can global guidelines support sustainable hygiene systems? by Esteves Mills, J, Thomas, A, Abdalla, N, El-Alam, R, Al-Shabi, K, Ashinyo, ME, Bangoura, FO, Charles, K, Chipungu, J, Cole, AO, Engebretson, B, Goyol, K, Grasham, CF, Grossi, V, Hickling, S, Kalandarov, S, Ababu, AK, Kholmuhammad, K, Klaesener-Metzner, N, Kugedera, Z, Kwakye, A, Lee-Llacer, A, Maani, PP, Makhafola, B, Mohamed, A, Monirul Alam, M, Monse, B, Northover, H, Palomares, A, Patabendi, N, Paynter, N, Prasad-Gautam, O, Panthi, SR, Rudge, L, Saha, S, Salaru, I, Saltiel, G, Sax, L, Shahid, MA, Gafur, MS, Shrestha, S, Szeberényi, K, Tidwell, JB, Trinies, V, Yiha, O, Ziganshin, R, Gordon, B, Cumming, O