BBC News By Chris Wood image captionCampaigners say centres of excellence could help lupus patients in Wales Calls have been made for specialist help in Wales to treat an incurable, life-limiting condition which takes an average of six years to diagnose. An estimated 2,000 people in Wales are affected by lupus. Campaigner Wendy Diment said centres of excellence would "extend the lives" of lupus patients in Wales. A Welsh Government spokeswoman said health boards could refer people for further treatment if it was not available locally. There is currently no cure for lupus and it occurs when the immune system mistakenly attacks healthy parts of the body.