title: Testing informatics innovations: the value of negative trials.
authors.forename: W M
authors.initials: WM
authors.lastname: Tierney
authors.forename: C J
authors.initials: CJ
authors.lastname: McDonald
mesh_terms: D000555:Ambulatory Care Information Systems; D001291:Attitude of Health Personnel; D001292:Attitude to Computers; D003258:Consumer Behavior; D008490:Medical Informatics; D012107:Research Design