1. University of Texas Medical Branch, Galveston, Texas, USA
2. Children's Hospital of Eastern Ontario, Ottawa, Ontario, Canada
3. Division of Infectious Diseases, Department of Medicine, University of Alberta, Walter Mackenzie Health Sciences Centre, Edmonton, Alberta, Canada
4. SmithKline Beecham Pharmaceuticals, Collegeville, Pennsylvania, USA
5. Viridae Clinical Sciences, Inc., Vancouver, British Columbia, Canada