title: Study design.
authors: Department of Preventive Medicine, Rush-Presbyterian-St Luke's Medical Center, Chicago, IL 60612.
authors: S
authors: S
authors: Shott
mesh_terms: D000818:Animals; D002985:Clinical Protocols; D002986:Clinical Trials as Topic; D004311:Double-Blind Method; D011897:Random Allocation; D012107:Research Design