His mother , Dr. Michell Lynn Arnow , is a practicing psychologist .
His father , Dr. Bert Zbar , is a cancer scientist at the National Cancer Institute , who along with Dr. Marston Linehan discovered 4 genes related to hereditary kidney cancer .
father 's mother , Dr. Michell Lynn Arnow , is a practicing psychologist .
His father , Dr. Bert Zbar , is a cancer scientist at the National Cancer Institute , who along with Dr. Marston Linehan discovered 4 genes related to hereditary kidney cancer .