1. Department of Medical Parasitology, New York University School of Medicine, New York, NY 10010
2. Research Center for Infectious Diseases, University of Würzburg, 97080 Würzburg, Germany
3. Sanaria Inc., Rockville, MD 20850
4. Department of Biochemistry, University of Lausanne, 1066 Epalinges, Switzerland
5. Department of Molecular Biology, Umea University, SE-901 87 Umea, Sweden
6. Center for Genetics and Genomics, School of Biology, The University of Nottingham, Nottingham NG7 2UH, England, UK