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The stakeholder advisory group on extremely low frequency (ELF) electromagnetic fields (EMF) (SAGE) is jointly sponsored by the Department of Health, the charity Children with Leukaemia and National Grid plc. The aim of SAGE is to bring together stakeholders to identify and explore the implications for a precautionary approach to ELF EMF and make practical recommendations for precautionary measures. Its terms of reference and ways of working are described on the website www.rkpartnership.co.uk/sage. The SAGE process has been running since 2004 and the website indicates that it is expected to produce its first report this year although no specific date has been set.