1. Sanofi Research, Sanofi Pharmaceuticals, Inc., Malvern, Pennsylvania, USA
2. National Institute of Occupational Safety and Health, Morgantown, West Virginia, USA
3. Procter and Gamble Co., Cincinnati, Ohio, USA
4. ILSI Risk Science Institute, Washington, DC, USA
5. Center for Drug Evaluation and Research, Division of Antiviral Drug Products, U.S. Food and Drug Administration, Rockville, Maryland, USA