Randomized trial of low molecular weight heparin (enoxaparin) versus unfractionated heparin for unstable coronary artery disease
Three metods for hysterectomy: a randomised, prospective study of short term outcome
Multicenter, randomized, controlled trial of delayed pushing for nulliparous women in the second stage of labor with continuous epidural analgesia
A randomized trial of cerclage versus no cerclage among patients with ultrasonographically detected second-trimester preterm dilatation of the internal os
Risk of Guillain-Barré syndrome after measles-mumps-rubella vaccination.