Classical Symphony (conducted by Nikolai Anosov), Prokofiev appeared to reach the peak of his celebrity as a leading Soviet composer. On 20 January 1945, Prokofiev suffered a concussion after fainting in his apartment due to untreated chronic hypertension. The composer Dmitry Kabalevsky visited him in hospital and found him semi-conscious, and "with a heavy heart, I left him, I thought it was the end." He never fully recovered from the injury, and, following medical advice, restricted his composing activity. Postwar Prokofiev had time to write his postwar Sixth Symphony and his Ninth Piano Sonata (for Sviatoslav Richter) before the so-called "Zhdanov Decree". On the day before the decree was published, 10 February 1948, Prokofiev was at a ceremony in the Kremlin to mark his elevation to the status of People's Artist of the RSFSR. The decree followed a three-day conference of more than 70 composers, musicians and music lecturers convened on 10 January, presided over by Zhdanov. Prokofiev was berated by a minor composer, Viktor Bely, who accused him of "innovation for innovation's sake" and "artistic snobbishness", but unlike Dmitri Shostakovich, Khachaturian and others, Prokofiev gave no speech. His silence set off rumors that he had been deliberately defiant and uncooperative. There is no official record, but according to a variety of witnesses, Prokofiev did not attend on the first day, and had to be fetched, arriving on day two wearing a brown suit and baggy-kneed trousers tucked into his felt boots. Ilya Ehrenburg, who was not in the hall, claimed in his memoirs that Prokofiev fell asleep, woke up suddenly and loudly asked who Zhdanov was. The cellist Mstislav Rostropovich heard that Prokofiev was chatting to the person next to him when a senior figure sitting nearby warned him to be quiet. Prokofiev asked: "Who are you?" The official said that his name did not matter, but that Prokofiev had better pay attention to him, to which Prokofiev retorted: "I never pay attention to comments from people who haven't been introduced to me." This possibly apocryphal story was corroborated by the head of the composers' union, Tikhon Khrennikov, who said that the person Prokofiev snubbed was the Stalinist official Matvei Shkiryatov. The decree, published on 11 February, denounced six artists—Shostakovich, Prokofiev, Khachaturian, Vissarion Shebalin, Gavriil Popov, and Myaskovsky, in that order—for the crime of "formalism", described as a "renunciation of the basic principles of classical music" in favor of