1. VERIFIN, Finnish Institute for Verification of the Chemical Weapons Convention, Department of Chemistry, University of Helsinki, FI-00014 Helsinki, Finland
2. AIRSENSE Analytics Gmbh, Hagenower Straße 73, 19061 Schwerin, Germany
3. Drug Research Program and Division of Pharmaceutical Chemistry and Technology and Department of Chemistry, University of Helsinki, FI-00014 Helsinki, Finland
4. New Mexico State University, 1175 N Horseshoe Dr., Las Cruces, New Mexico 88003, United States