1. Department of Virology; National Institute of Infectious Diseases-ANLIS “Dr. Carlos G. Malbrán”; Buenos Aires Argentina
2. Department of Pathology; VU University Medical Center; Amsterdam The Netherlands
3. Hospital de Infecciosas “Dr. F. Muñiz”; Buenos Aires Argentina
4. Hospital General de Agudos “Dr. Cosme Argerich”; Buenos Aires Argentina
5. Instituto de Oncologia “Angel Roffo”; Buenos Aires Argentina