title: Do multiinstitutional studies represent a higher level of research than single institution studies?
authors.affiliation: Department of Surgery, University of Alabama at Birmingham 35294, USA.
authors.forename: D C
authors.initials: DC
authors.lastname: Naftel
mesh_terms: D002986:Clinical Trials as Topic / Q000706:statistics & numerical data*; D003625:Data Collection; D003627:Data Interpretation, Statistical; D006801:Humans; D015337:Multicenter Studies as Topic / Q000706:statistics & numerical data*; D011446:Prospective Studies; D011785:Quality Assurance, Health Care; D012107:Research Design