1. Depratment of Surgery, University of Alberta, Edmonton, AB, Canada T6G 2B7
2. 416 Community Services Center, Royal Alexandra Hospital, 10240 Kingsway Avenue, Edmonton, AB, Canada T6G 2B7
3. John W. Scott Health Sciences Library, University of Alberta, Edmonton, AB, Canada T6G 2R7
4. School of Public Health, University of Alberta, Edmonton, AB, Canada T6G 1C9
5. Division of Critical Care Medicine, Faculty of Medicine and Dentistry, University of Alberta, Edmonton, AB, Canada T6G 2B7