In many cases, NTMs can be classified as non-tariff barriers to trade (NTBs). Some areas of NTMs are dealt with under specific WTO agreements, notably the Agreement on the Application of Sanitary and Phytosanitary Measures, the Agreement on Technical Barriers to Trade, the Anti-dumping agreement, the Agreement on Subsidies and Countervailing Measures and the Agreement on Safeguards. WTO Members seek to continually improve market access through the regular WTO work programme and through negotiations such as those launched at the Doha Ministerial Conference in November 2001.