TY - JOUR T1 - Searching for evidence: principles and practice JF - Evidence Based Medicine JO - Evid Based Med SP - 133 LP - 136 DO - 10.1136/ebm.1999.4.133 VL - 4 IS - 5 AU - Andrew Booth AU - Alan J. O'Rourke Y1 - 1999/10/01 UR - http://ebm.bmj.com/content/4/5/133.abstract N2 - 300 Multiple ChoicesThis is a pdf-only article and there is no markup to show you.full-text.pdf ER -