1. U.S. Naval Medical Research Unit No. 6 Callao Peru
2. Johns Hopkins Bloomberg School of Public Health Baltimore MD USA
3. Influenza Division Centers for Disease Control and Prevention Atlanta GA USA
4. General Directorate of Epidemiology Ministry of Health Lima Peru
5. Tulane School of Public Health and Tropical Medicine New Orleans LA USA
6. Division of Global Disease Detection International Emerging Infections Program Centers for Disease Control and Prevention Nairobi Kenya