1. Division of Infectious Diseases, School of Medicine, University of California Irvine, California.
2. Antigen Discovery, Inc., Irvine, California.
3. International Foundation Against Infectious Diseases in Nigeria, Abuja, Nigeria.
4. Aminu Kano Teaching Hospital, Kano, Nigeria.
5. University of Abuja Teaching Hospital, Gwagwalada, Nigeria.
6. Department of Pediatrics, University of Nebraska Medical Center, Omaha, Nebraska.