• ad hoc group on Pharmacogenetics This Group met once in 2002 and finalised a position paper on terminology in pharmacogenetics, which was published in November 2002. • ad hoc Groups on Biological and Chemical Threats At the request of the European Commission, the EMEA established two CPMP ad hoc groups responsible for drafting guidance documents on medicinal products to be used in the framework of biological and chemical threats (see also Vaccine Expert Group activities).