Beyond the grid: Navigating water supply and sanitation service ecosystems in informal settlements - Ana Casas; Paul Hutchings; Andrew R. Bell; Beata Kupiec-Teahan; Amy R. Lewis; José Mendoza Sanchez; Simon Willcock; Fiona Anciano; Dani J. Barrington; Mmeli Dube; Caroline Karani; Arturo Llaxacondor; et al. (PLoS ONE, 2026)