Jan Kitajewski is the Charles and Marie Robertson Professor of Obstetrics/Gynecology at Columbia.  Dr. Kitajewski is a faculty member in Pathology and Ob/Gyn at Columbia University Medical Center.  His current duties include; Director of the Division of Reproductive Sciences in Ob/Gyn, Director of the Cancer Signaling Networks program at the Herbert Irving Comprehensive Cancer Center, and Charter Member of NIH Cardiovascular Differentiation and Development study section.