1. Ruth Ben-Ari Institute of Clinical Immunology, Kaplan Medical Center, Rehovot 76100, Israel
2. Cupron, Inc., POB 10973, Greensboro, NC 27404
3. Institute for Antiviral Research, Utah State University, Logan, Utah 84322-5600
4. Department of Virology, Faculty of Health Sciences, Soroka Academic Medical Center, Beer-Sheva 84105, Israel