1. Division of Infectious Diseases, St. John’s Cardiovascular Research Center, Department of Medicine, Harbor-UCLA Research and Education Institute, Torrance, California 905091;
2. UCLA School of Medicine, Los Angeles, California 900242;
3. Institut de Microbiologie, Centre Hospitalier Universitaire Vaudois, CH 1011 Lausanne, Switzerland3; and
4. Institut für Allgemeine Botanik, AMP III, Universität Hamburg, D-22609 Hamburg, Germany4