1. Department of Cryopreservation and Reproductive Technologies, Institute of Cytology and Genetics, Siberian Branch of the Russian Academy of Sciences, Novosibirsk, Russia.
2. Department of Natural Sciences, Novosibirsk State University, Novosibirsk, Russia.
3. Laboratory of Condensed Matter, Institute of Automation and Electrometry, Siberian Branch of the Russian Academy of Sciences, Novosibirsk, Russia.
4. Center of Species Survival, Smithsonian Conservation Biology Institute, Smithsonian National Zoological Park, Washington, District of Columbia.