Controlled trials in children: quantity, methodological quality and descriptive characteristics of pediatric controlled trials published 1948-2006.
Thomson
Denise
D
Cochrane Child Health Field, Department of Pediatrics, University of Alberta, Edmonton, Canada.
Hartling
Lisa
L
Cohen
Eyal
E
Vandermeer
Ben
B
Tjosvold
Lisa
L
Klassen
Terry P
TP