1. Institute for Medical, Microbiology, Immunology and Parasitology, University Clinic Bonn, Sigmund-Freud-Str. 25, D-53105 Bonn, Germany
2. Molecular Parasitology Division, New England Biolabs, 240 County Road, Ipswich, MA 01938, USA
3. UC Davis Genome Center, University of California, Davis, CA 95616, USA