 Meanwhile, Drs.AV Dekopov, AA Tomskiĭ, VA Shabalov and EM Salova of the large Burdenko neurosurgical clinic in Moscow, Russia are among those who advocate strongly for the SDR procedure, including in adults, and the clinic lays claim not only to being the largest and most experienced SDR-performing clinic in Russia (probably analogous in that sense to the current status of St Louis Children's Hospital in the United States), but also to performing about fifteen adult SDR procedures per year; these are all facts that until recently may have been almost entirely unknown outside of the Caucasus region.The Chengdu and Shanghai areas of China have surgeons trained in SDR who perform the procedure successfully on adults.