1. Unité des Rickettsies, Faculté de Médecine, CNRS UMR 6020 27, Université de la Méditerranée, 13385 Marseille, Cedex 05, France
2. Ohara Research Laboratory, Ohara General Hospital, Fukushima 960-0195
3. Department of Immunology and Medical Zoology, Fukui Medical University, Matsuoka, Fukui 910-1193, Japan