. . . . . . . . "Mr. Vinocour has been a guest of the Boston Chamber Music Society and International Sejong Soloists and he has collaborated with artists such as Paula Robison, Yefim Bronfman, Gilbert Kalish, Miriam Fried, Yo-Yo Ma, Jaime Laredo, and members of the Amadeus, Arditti, Cleveland, Guarneri, Juilliard, Jupiter, Mendelssohn, and Orion string quartets." . .