. . "2004-06-17"^^ . _:b662928680 . . _:b662928680 . "328" . . . . "1490" . "328" . _:b662928680 . "Grading quality of evidence and strength of recommendations" . "10.1136/bmj.328.7454.1490" . . "1490" . "BMJ" . _:b662928680 . "10.1136/bmj.328.7454.1490" . _:b662928680 . . . _:b662928680 "2023-12-21T20:13:54.549031"^^ . "10.1136/bmj.328.7454.1490" .