1. 1Medical Toxicology Centre, Imam Reza Hospital, Mashhad 91735-348, Islamic Republic of Iran
2. 2University of Stellenbosch, Matieland, 7602, South Africa
3. 3Department of Chemistry, University of Bergen, 5007 Bergen, Norway
4. 4International Disarmament Consultant, 74270 Chessenaz, France