1. Sections of Bacteriology, Department of Microbiology, National Autonomous University of Honduras
2. Sections of Immunology, Department of Microbiology, National Autonomous University of Honduras
3. Department of Clinical Bacteriology, Huddinge University Hospital, Karolinska Institute, Stockholm, Sweden
4. Outpatient Clinic for the Control of Sexually Transmitted Diseases, ‘Las Crucitas' Health Center of the Ministry of Public Health, Tegucigalpa, Honduras