SEARCH Articles Figures Tables Cell transplantation multicenter trials Clinical trials multicenter evaluations Danish Multicenter Randomized Study trial Italian multicenter trial Multicenter Automatic Defibrillator Implant Trial Multicenter UnSustained Tachycardia Trial MUSTT) Multicenter automatic defibrillator implantation trial Multicenter automatic defibrillator implantation trial MADIT) Multicenter automatic defibrillator trial Multicenter diltiazem postinfarction trial Multicenter trials interactions Multicenter trials multiplicity Multicenter unsustained tachycardia trial Weighting, multicenter trials