1. Laboratory of Parasitic DiseasesNational Institute of Allergy and Infectious Diseases Bethesda Maryland
2. Oral and Pharyngeal Cancer BranchNational Institute of Dental and Craniofacial Research Bethesda Maryland
3. Laboratory of Molecular BiologyNational Institute of Diabetes and Digestive and Kidney Diseases, National Institutes of Health Bethesda Maryland, 20892