Prevalence and intensity of soil-transmitted helminth infections of children in sub-Saharan Africa, 2000-18: a geospatial analysis by Sartorius, B, Cano, J, Simpson, H, Tusting, LS, Marczak, LB, Miller-Petrie, MK, Kinvi, B, Zoure, H, Mwinzi, P, Hay, SI, Rebollo, M, Pullan, RL