1. Research Institute of Hygiene, Occupational Pathology and Human Ecology Federal State Unitary Enterprise; Federal Medical Biological Agency; Build. 93, Kapitolovo Station, Kuz'molovsky g/p Vsevolozhsky District Leningrad Region RU-188663
2. Leffingwell & Associates; 4699 Arbor Hill Rd. Canton GA 30115 USA
3. All-Russian Institute of Plant Protection (VIZR) Podbelskogo shosse; 3 St.-Petersburg Pushkin RU-196608