1. Oral and Pharyngeal Cancer Branch, National Institute of Dental and Craniofacial ResearchNational Institutes of HealthBethesda MD
2. Laboratory of Cellular and Molecular Biology, National Cancer InstituteNational Institutes of HealthBethesda MD
3. Laboratory of Tight Junction Structure and FunctionNational Heart, Lung, and Blood InstituteBethesda MD
4. Cell Biology and Metabolism Program, Eunice Kennedy Shriver National Institute of Child Health and Human DevelopmentNational Institutes of HealthBethesda MD