Further to your article (September 9) about developments in ME research, our charity has been supporting and representing those in Sussex affected by this illness for nearly 20 years.

We have been involved in the Medical Research Council's consultation process and continue to follow developments.

Recent UK studies which indicate genetic abnormalities in those with CFS/ME, possibly following viral infection, are indeed exciting and could lead to a diagnostic marker.

Presently, diagnosis has had to rely on good clinical history taking and the elimination of other possible causes for the symptoms.

Thankfully, there is now a specialist NHS service in Sussex which can provide diagnosis, symptom control and management strategies to help patients.

We have happily worked with the Primary Care Trusts over two years planning and now developing the new services which are designed to serve many of the estimated 5,000 adults and children across the county who have this illness.

For information about the new CFS/ME service, call 01273 674828.

-Colin Barton, chair of trustees, Sussex & Kent ME/CFS, Society,www.measussex.org.uk