"Boston Symphony Orchestra" . . . "Perspectives: Christian Tetzlaff\r\nBoston Symphony Orchestra Assistant Conductor Marcelo Lehninger substituted for James Levine, who was suffering ill effects from a recent procedure addressing his continuing back issues.\r\nNEW YORK PREMIERE of Harrison Birtwistle's VIOLIN CONCERTO" . "symphony orchestra performance" . "2011-03-15T20:00:00"^^ . . . . . . . .