1. Complementary and alternative medicine use among adults: United States, 2002;Barnes;Advance Data,2004
2. Directive 2004/24/EC of the European Parliament and of the Council of 31 March 2004 amending, as regards traditional herbal medicinal products, Directive 2001/83/EC on the Community code relating to medicinal products for human use,2004
3. Directive 2002/46/EC of the European Parliament and of the Council of 10 June 2002 on the approximation of the laws of the Member States relating to food supplements,2002
4. Use of botanicals in food supplements. Regulatory scope, scientific risk assessment and claim substantiation;Coppens;Ann Nutr Metab,2006