Scientists & Staff | National Institute of Environmental Health Sciences Skip Navigation Scientists & Staff Close the left navigation Add Synaptic & Developmental Plasticity Group Serena M. Dudek Sommer, Ph.D. Acting Chief, Neurobiology Laboratory and Senior Investigator Tel 984-287-3513 [email protected] Georgia M. Alexander, Ph.D. Staff Scientist Tel 984-287-3503 [email protected] Darrien I. Coates Fellow - Postbaccalaureate Tel 984-287-3505 [email protected] Chunfang Gu, Ph.D. Staff Scientist Tel 984-287-3492 [email protected] Basak Kandemir, Ph.D. Fellow - Visiting Tel 984-287-3977 [email protected] Daniel Radzicki, Ph.D. Biologist Tel 984-287-3509 [email protected] Preston N. Siegler Fellow - IRTA Predoctoral Tel 984-287-4570 [email protected] Back to Top Last Reviewed: April 15, 2026