(Q29619791)
Statements
GRADE guidelines: 4. Rating the quality of evidence--study limitations (risk of bias) (English)
Oxman AD
Guyatt GH
Kunz R
Brozek J
Alonso-Coello P
Montori V
Akl EA
Djulbegovic B
Falck-Ytter Y
Norris SL
Williams JW Jr
Atkins D
Meerpohl J
Schünemann HJ
April 2011
64
407-15