1. Microbiologist, Coordinator of the Microbiology and Medicinal Chemistry Program, Medicinal Chemistry and Chemical Biology Program, Department of Pharmaceutical Sciences, Faculty of Science, Utrecht University. David de Wiedgebouw, P. O. B. 80082, 3508 TB Utrecht, The Netherlands; Centro de Investigaciones Apícolas Tropicales, Universidad Nacional. P. O. Box 475-3000 Heredia, Costa Rica
2. Associate Professor, Medicinal Chemistry and Chemical Biology Program, Department of Pharmaceutical Sciences, Faculty of Science, Utrecht University. David de Wiedgebouw, P. O. B. 80082, 3508 TB Utrecht, The Netherlands
3. Senior Technician, Medical Microbiology, University Medical Center Utrecht, P. O. B. 85500, 3508 GA Utrecht, The Netherlands
4. Research and Education Assistant, Medicinal Chemistry and Chemical Biology Program, Department of Pharmaceutical Sciences, Faculty of Science, Utrecht University. David de Wiedgebouw, P. O. B. 80082, 3508 TB Utrecht, The Netherlands
5. Assistant Professor, Coordinator of the Bacteriology Group, Medical Microbiology, University Medical Center Utrecht, P. O. B. 85500, 3508 GA Utrecht, The Netherlands; Laboratory of Phytopatology, Wageningen University. P. O. Box 16, 6700 A A Wageningen, The Netherlands
6. Coordinator of the Laboratory of Food Microbiology, Facultad de Microbiología, Universidad de Costa Rica. P. O. Box 2060-1000 San José, Costa Rica