Russian president Vladimir Putin has become 'withdrawn, silent and deeply preoccupied' as he undergoes new medical treatment, it was claimed today. The claims were made by Putin-watching channel Telegram channel General SVR, which alleges inside knowledge from his circle and links to his bodyguards. There has been speculation in Russia that 70-year-old Putin is suffering from cancer, early stage Parkinson's disease and other ailments including a schizoaffective disorder. 'Putin is undergoing a course of treatment with drugs which, in addition to their therapeutic effect, cause weakness, dizziness, [and] lack of appetite, which does not affect his psycho-emotional state in the...