1. Division of Infectious Diseases, Henry Ford Hospital
Detroit, MIUSA
2. Centro Médico Militar, Guatemala CityGuatemala
3. Four Rivers Clinical Research Inc.
Paducah, KYUSA
4. Medical College Baroda and Sir Sayajirao General Hospital
VadodaraIndia
5. Makassed General Hospital
BeirutLebanon
6. AstraZeneca
Wilmington, DEUSA