Carole A Estabrooks*1, Linda Derksen2, Connie Winther3, John N Lavis4, Shannon D Scott5, Lars Wallin6 and Joanne Profetto-McGrath7 Address: 1Faculty of Nursing, Third Floor Clinical Sciences Building, University of Alberta, Edmonton, Alberta, Canada, 2Department of Sociology, Vancouver Island University, Nanaimo, British Columbia, Canada, 3Department of Pediatrics, Faculty of Medicine, University of Alberta, Edmonton, Alberta, Canada, 4Department of Clinical Epidemiology and Biostatistics and Department of Political Science, McMaster University, Hamilton, Ontario, Canada, 5Faculty of Nursing, University of Alberta, Edmonton, Alberta, Canada, 6Department of Neurobiology, Care Sciences and Society, Division of Nursing, Karolinska Institute and Clinical Research Utilization (CRU),. | Implementation Science BioMed Central Research article Open Access The intellectual structure and substance of the knowledge utilization field A longitudinal author co-citation analysis 1945 to 2004 Carole A Estabrooks 1 Linda Derksen2 Connie Winther3 John N Lavis4 Shannon D Scott5 Lars Wallin6 and Joanne Profetto-McGrath7 Address faculty of Nursing Third Floor Clinical Sciences Building University of Alberta Edmonton Alberta Canada 2Department of Sociology Vancouver Island University Nanaimo British Columbia Canada 3Department of Pediatrics Faculty of Medicine University of Alberta Edmonton Alberta Canada 4Department of Clinical Epidemiology and Biostatistics and Department of Political Science McMaster University Hamilton Ontario Canada 5Faculty of Nursing University of Alberta Edmonton Alberta Canada department of Neurobiology Care Sciences and Society Division of Nursing Karolinska Institute and Clinical Research Utilization CRU Karolinska University Hospital Stockholm Sweden and 7Faculty of Nursing University of Alberta Edmonton Alberta Canada Email Carole A Estabrooks - Linda Derksen - Connie Winther - John N Lavis - lavisj@ Shannon D Scott - Lars Wallin - Joanne Profetto-McGrath - Corresponding author Published 13 November 2008 Received 19 December 2007 . r r Accepted 13 November 2008 Implementation Science 2008 3 49 doi l748-5908-3-49 This article is available from http content 3 1 49 2008 Estabrooks et al licensee BioMed Central Ltd. This is an Open Access article distributed under the terms of the Creative Commons Attribution License http licenses by which permits unrestricted use distribution and reproduction in any medium provided the original work is properly cited. Abstract Background It has been argued that science