title: Methodological issues in studies of the effectiveness of pressure ulcer prevention interventions.
authors.affiliation: Department of Epidemiology and Preventive Medicine, University of Maryland School of Medicine, Baltimore, MD, USA.
authors.forename: Mona
authors.initials: M
authors.lastname: Baumgarten
authors.forename: Michelle
authors.initials: M
authors.lastname: Shardell
authors.forename: Shayna
authors.initials: S
authors.lastname: Rich