RT Journal Article SR Electronic T1 Accessing the online evidence: a guide to key sources of research information on clinical and cost effectiveness JF Quality and Safety in Health Care JO Qual Saf Health Care FD BMJ Publishing Group Ltd SP 229 OP 231 DO 10.1136/qhc.12.3.229 VO 12 IS 3 A1 J Glanville A1 P Wilson A1 R Richardson YR 2003 UL http://qualitysafety.bmj.com/content/12/3/229.abstract AB Advice on how to access the best available online sources of research evidence on clinical and cost effectiveness published in three recent issues of Effectiveness Matters is reviewed.