High quality, less bias.
Needleman
I
I
Worthington
H
H
Fernandez-Gonzalez
L
L
Brunton
P
P
Clarkson
J
J
Coulthard
P
P
Esposito
M
M
Glenny
A-M
AM
Hooper
L
L
Marinho
V
V
Moles
D
D
Shaw
W
W
D018849:Controlled Clinical Trials as Topic; D016206:Databases, Bibliographic; D018865:Dental Research; D019317:Evidence-Based Medicine; D006801:Humans; D012196:Review Literature as Topic