An investigation by the Russian opposition journal Proekt, released on Friday, tells the story of a Vladimir Putin who appears to be "constantly" accompanied by a doctor specializing in thyroid cancer. According to the report, surgeon Yevgeny Selivanov of Moscow's Central Clinical Hospital, who wrote his thesis on thyroid cancer, has flown to Putin's resort in Sochi at least 35 times. "We promised to reveal to you the main secret of the Kremlin. Of course, we are talking about the health of Vladimir Putin," Proekt said.