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Table 1 Literature sources and search steps*

From: Negative pressure wound therapy: Potential publication bias caused by lack of access to unpublished study results data

Category Sources
Step 1  
Bibliographic databases MEDLINE: Includes PubMed and Clinical Queries.
The Cochrane Library. These databases were searched:
Cochrane Database of Systematic Reviews (CDSR; Cochrane Reviews)
Database of Abstracts of Reviews of Effects (DARE; Other Reviews)
Cochrane Central Register of Controlled Trials (CENTRAL; Clinical Trials)
Health Technology Assessment Database (HTA; Technology Assessments)
NHS Economic Evaluation Database (NHSEED; Economic Evaluations)
Step 2  
Online trial registers
National Research Register (NRR)
Step 3  
Authorities German Federal Joint Committee (references cited by experts in 2003)
United States Federal Drug Administration (FDA) (online search)
German Federal Institute for Drugs and Medical Devices (direct enquiry by e-mail and phone)
Step 4  
Systematic reviews Ontario Health Technology Advisory Committee 2006 (OHTAC)
Pham 2006, Australian Safety and Efficacy Register of New Interventional Procedures – Surgical (ASERNIP-S)
Costa 2005, McGill University Health Centre Technology Assessment Unit (MUHC)
Samson 2004, United States Agency for Healthcare Research and Quality (AHRQ)
Higgins 2003, Centre for Clinical Effectiveness (CCE)
Fisher 2003, Canadian Coordinating Office of Health Technology Assessment (CCOHTA)
Evans 2001, Cochrane database of systematic reviews (CDSR)
Step 5  
Congress proceedings V.A.C.® Wundtherapie, 10 Jahre V.A.C., Drei-Länder-Kongress [V.A.C. Wound Therapy, 10 Years of V.A.C., Three-Country Conference], Graz, Austria; 2005.
Symposium on Advanced Wound Care, San Diego, California, USA; 2005.
Second World Union of Wound Healing Societies Meeting, Paris, France; 2004.
V.A.C.® Wundtherapie, Drei-Länder-Kongress [V.A.C. Wound Therapy, Three-Country Conference], Mainz, Germany; 2004.
  First international topical negative pressure (TNP) therapy focus group meeting in London, UK, December 2003. Proceedings. Edited by: Banwell P, Teot L. Supported by the European Tissue Repair Society. Faringdon, UK: TXP Communications; 2004.
Vacuum Assisted Closure (V.A.C.®), Salzburg, Austria; 2003.
Eleventh Annual Meeting and Educational Symposium, Wound Healing Society, Albuquerque, New Mexico, USA; 2001.
Step 6  
Manufacturers (direct enquiries by e-mail and post) Kinetic Concepts, Inc., San Antonio, Texas, USA.
BlueSky Medical Group, Inc., Carlsbad, California, USA
Step 7  
Authors (direct enquiries by e-mail and post) Adams; Armstrong; Bayer; Foo; Fryer; Greer; Gupta; Heath; Lantis; McCarthy J; McCarthy M; Molnar; Niezgoda; Orgill; Payne; Stannard (3 RCTs); Vuerstaek; Walker
  1. * Other sources available on request.
  2. † Search executed in May 2005 and updated in December 2006.
  3. ‡ Hayes 2003 [71] was not publicly available and therefore not considered. OHTAC 2004 [72] and Pham 2003 [73] were not considered because updated versions are available.