This guideline is more than 5 years old and has not yet been updated to ensure that
it reflects current knowledge and practice. In accordance with national standards,
including those of the Agency for Healthcare Research and Quality’s National Guideline Clearinghouse
, this guideline can no
longer be assumed to be current. The November 2005 Guideline Watch associated with
this guideline provides additional information that has become available since publication
of the guideline, but it is not a formal update of the guideline.