Randomized controlled trials.
Stolberg
Harald O
HO
Department of Radiology, McMaster University Medical Centre, 1200 Main St. W, Hamilton, ON L8N 3Z5, Canada.
Norman
Geoffrey
G
Trop
Isabelle
I
D004992:Ethics, Medical; D006801:Humans; D011871:Radiology; D016032:Randomized Controlled Trials as Topic; D012107:Research Design