Could anyone help me with a reference (which I would like to site in my thesis) for this excellent saying of Ian Chalmers: If you don't know what to do, then you should not make guidelines or consensus conferences, but controlled randomized trials! Then you can make your practice guidelines. (Ian Chalmers) ~~~~~~ Mail to: Benedicte Eskeland, M.D., research fellow Division for General Practice University of Bergen Ulriksdal 8C N-5009 Bergen Norway Phone:+475586132; Fax: +4755586130; Http://www.uib.no/isf/Welcome.html