Dear list. I was just shown: "A system for rating the stability and strength of medical evidence" BMC Medical Research Methodology 2006, 6:52 doi:10.1186/1471-2288-6-52 by Jonathan R. Treadwell, Stephen J. Tregear, James T. Reston and Charles M. Turkelson at http://www.biomedcentral.com/1471-2288/6/52 Has anyone read this paper and would like to comment? Regards Ulf Eriksson Karlskrona Sweden