The Friends of NCBDDD (formerly the External Partners Group, EPG) is a coalition of government and private sector participants who work together to enhance the mission and activities of the National Center on Birth Defects and Developmental Disabilities (NCBDDD) in promoting child development; preventing birth defects and developmental disorders/disabilities; and enhancing the quality of life and preventing secondary conditions among people who are living with mental or physical disabilities, or a combination thereof.