RT Journal Article
SR Electronic
T1 Purpose and Procedure
JF Evidence Based Medicine
JO Evid Based Med
FD BMJ Publishing Group Ltd
SP 130
OP 131
DO 10.1136/ebm.1999.4.130
VO 4
IS 5
YR 1999
UL http://ebm.bmj.com/content/4/5/130.abstract
AB