Do multiinstitutional studies represent a higher level of research than single institution studies?
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Department of Surgery, University of Alabama at Birmingham 35294, USA.
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