%0 Journal Article %A J Grimshaw %A I Russell %T Achieving health gain through clinical guidelines. I: Developing scientifically valid guidelines. %D 1993 %R 10.1136/qshc.2.4.243 %J Quality in Health Care %P 243-248 %V 2 %N 4 %U https://qualitysafety.bmj.com/content/qhc/2/4/243.full.pdf