RT Journal Article
SR Electronic
T1 Purpose and Procedure
JF Evidence Based Medicine
JO Evid Based Med
FD BMJ Publishing Group Ltd
SP 98
OP 99
DO 10.1136/ebm.1997.2.98
VO 2
IS 4
YR 1997
UL http://ebm.bmj.com/content/2/4/98.abstract
AB