E V Shaidakov1, A G Grigoryan1, E A Ilyukhin2, D A Rosukhovskiy1, V L Bulatov3. 1. Institute of Experimental Medicine of the Russian Academy of Medical Sciences, St Petersburg, Russia. 2. Private surgical clinic "Medalp", St Petersburg, Russia. 3. Institute of Bioregulation and Gerontology of the Russian Academy of Medical Sciences, St. Petersburg, Russia.