Here is a helpful comment from Gerd Antes who had problems sending it to
the List:
An excellent and brief discussion of this issue is in an editorial by
Charles Young
and Richard Horten "Putting clinical trials into context"
(www.thelancet.com Vol 366 July 9, 2005).
One of the articles discussed there show how the process of
including "older" research results
is "losing" its memory over time.
Another very helpful source is the James Lind Library
(http://www.jameslindlibrary.org/ )
there especially
http://www.jameslindlibrary.org/essays/interpretation/systematic-reviews-
of-all-the-relevant-evidence.html
Gerd Antes (German Cochrane Centre)
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