Development of the ECHOES national dataset: a resource for monitoring post-acute and long-term COVID-19 health outcomes in England - Allen, Hester; Hassell, Katie; Rawlinson, Christopher; Pullen, Owen; Campbell, Colin; Jödicke, Annika M.; Català, Martí; Prats-Uribe, Albert; Dabrera, Gavin; Prieto-Alhambra, Daniel; Campos-Matos, Ines (Frontiers in Public Health, 2025)