1. Blood Systems Research Institute, San Francisco, California, USA
2. Department of Laboratory Medicine, University of California at San Francisco, San Francisco, California, USA
3. School of Medicine, Research and Innovation Centre of the Faculty of Health Sciences, Universidad Peruana de Ciencias Aplicadas, Lima, Peru
4. Instituto de Investigación Nutricional, Lima, Peru
5. Department of Virology, University of Helsinki, Helsinki, Finland