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In page Clara Haskil:

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Well regarded as a chamber musician, Haskil collaborated with George Enescu, Eugène Ysaÿe, Pablo Casals, Dinu Lipatti, Joseph Szigeti, Géza Anda, Isaac Stern, Henryk Szeryng and Arthur Grumiaux, with whom she played her last concert.[citation needed] While renowned primarily as a violinist, Grumiaux was also a fine pianist, and he and Haskil would sometimes swap instruments.