News from the National Library of Medicine, from "NLM Technical Bulletin", May-June, 2008, No. 362:

Soon we are likely to encounter — in PubMed’s "AbstractPlus" format — related review articles listed by decreasing relevancy, in a box at the lower right.   Above at the right are related references.

For an illustration, see:

  *NLM Technical Bulletin, May-Jun 2008, Related Reviews Coming to AbstractPlus in PubMed
  http://www.nlm.nih.gov/pubs/techbull/mj08/mj08_related_reviews.html