1. Infection Diseases Laboratory, Colsan/UNIFESP, Avenida Indianópolis, 1260 Indianópolis, São Paulo, SP, Brazil
2. American Red Cross, USA
3. Colsan, Technical and Research Department, Brazil
4. Colsan, Quality Laboratory, Brazil
5. Retrovirology Laboratory, UNIFESP, Brazil
6. Colsan, Associação Beneficente de Coleta de Sangue, Head Colsan, Brazil