Moscow, Central Federal District, Russia; Saint Petersburg, Northwestern Federal District, Russia; Kazan, Volga Federal District, Russia; Sochi, Southern Federal District, Russia; Volgograd, Southern Federal District, Russia; Yekaterinburg, Ural Federal District, Russia; Kaliningrad, Northwestern Federal District, Russia; Nizhny Novgorod, Volga Federal District, Russia; Rostov-on-Don, Southern Federal District, Russia; Samara, Volga Federal District, Russia; Saransk, Volga Federal District, Russia