Probable Mechanisms of Doxorubicin Antitumor Activity Enhancement by Ginsenoside Rh2 oleh Alexander Popov, Anna Klimovich, Olga Styshova, Alexander Tsybulsky, Dmitry Hushpulian, Andrey Osipyants, Anna Khristichenko, Sergey Kazakov, Manuj Ahuja, Navneet Kaidery, Bobby Thomas, Vladimir Tishkov, Abraham Brown, Irina Gazaryan, Andrey Poloznikov