The Centers for Disease Control and Prevention's (CDC) National Center for Health Statistics (NCHS) maintains international health statistics programs with more than 20 countries, including bilateral agreements. These programs consist of cooperative projects and collaborative research on analytical and methodological issues, technical assistance, consultations, training, information exchange, and liaising with multinational agencies. In addition, NCHS sponsors and hosts international meetings and symposia, and contributes via scientific articles and lectures. Responsibilities for these projects are spread across a variety of NCHS divisions and offices, including the International Statistics Program (ISP). Through these efforts, NCHS seeks to improve the availability of and advance the quality and comparability of health data in the United States and other countries.