1. Departamento de Microbiología y Biología Celular, Facultad de Farmacia, Universidad de La Laguna, 38071 La Laguna, Tenerife, Spain
2. Departments of Marine Sciences, University of Georgia, Athens, GA 30602, USA
3. Departments of Microbiology, University of Georgia, Athens, GA 30602, USA
4. Institüt für Mikrobiologie, Universität Göttingen, 37077 Göttingen, Germany
5. Institüt für Biochemie, Genetik und Mikrobiologie, Universität Regensburg, D-93040 Regensburg, Germany
6. Department of Biological Sciences, University of Southern California, Los Angeles, CA 90089, USA
7. Department of Marine Sciences, University of South Alabama, Mobile, AL 36688, USA