1. Département de Parasitolgie, Groupe Hospitalier Pitie-Salpêtrière, 75013 Paris, France.
2. Malaria Branch, Naval Medical Research Institute, Bethesda, MD 20814.
3. Department of Immunology, Walter Reed Army Institute of Research, Washington, DC 20307.
4. Department of Molecular Genetics, Smith Kline & French Laboratories, King of Prussia, PA 19101.
5. Musèum National d'Histoire Naturelle, Laboratoire de Zoologie-Vers, 750S0 Paris, France.
6. Service lmmunothérapie Experimentale, Institut Pasteur, 75015 Paris, France.
7. Service de Chiurgie, Groupe Hospitalier Pitie-Salpêtrière.