Russia's Prime Minister Vladimir Putin (R) socializes with a young patient as he visits the Federal Scientific Clinical Center of Pediatric Hematology, Immunology and Oncology in Moscow, on February 15, 2012. After serving two consecutive presidential terms between 2000 and 2008 and a term as prime minister, Putin is seeking a third term in the March 4 presidential election.. AFP PHOTO/ RIA-NOVOSTI/ALEXEI NIKOLSKY

Russia's Prime Minister Vladimir Putin smiles as he visits a high school in the Urals city of Kurgan, on February 13, 2012. After serving two consecutive presidential terms between 2000 and 2008 and a term as prime minister, Putin is seeking a third term in the March 4 presidential election.AFP PHOTO/ RIA-NOVOSTI/ALEXEI NIKOLSKY

Russia's Prime Minister Vladimir Putin (2nd L) drinks tea with students as he visits a high school in the Urals city of Kurgan, on February 13, 2012. After serving two consecutive presidential terms between 2000 and 2008 and a term as prime minister, Putin is seeking a third term in the March 4 presidential election.AFP PHOTO/ RIA-NOVOSTI/ALEXEI NIKOLSKY

Russian Orthodox Church Head, Patriarch Kirill, shows the renovated interior of the Danilov (St. Daniel) Monastery to Russian Prime Minister Vladimir Putin (R), during their meeting at the monastery in Moscow, on February 1, 2012. Putin congratulated today the Orthodox Patriarch on the 3rd anniversary of his enthronement in Kirill's residence. AFP PHOTO/ RIA-NOVOSTI/ YANA LAPIKOVA