RT Journal Article SR Electronic T1 Grading evidence from test accuracy studies: what makes it challenging compared with the grading of effectiveness studies? JF Evidence Based Medicine JO Evid Based Med FD BMJ Publishing Group Ltd SP 81 OP 84 DO 10.1136/ebmed-2017-110717 VO 22 IS 3 A1 Ewelina RogoziƄska A1 Khalid Khan YR 2017 UL http://ebm.bmj.com/content/22/3/81.abstract AB