Guidance for the preparation of neurological management guidelines by EFNS scientific task forces--revised recommendations 2004.

Since the publication of the first EFNS task force reports in 1997, a total of 20 evidence-based guidelines for the treatment and management of neurological diseases have been published by the EFNS (http://www.efns.org/guidelines). In 2001, recommendations for the preparation of neurological guidelines were issued by the EFNS Scientific Committee (Eur J Neurol 2001; 8: 549-550). These have now been updated and revised. More unified criteria for standards of reporting are set up which include classes of scientific evidence and predefined levels of recommendation. These criteria as well as others listed below should be used for all working groups that aim at recommending treatment, diagnostic procedures or other interventions within the framework of the EFNS.