Mariss Jansons
Henry Doktorski III (born January 30, 1956) is an American accordionist, organist and author. He has performed on accordion with cellist Mstislav Rostropovich, violinists Gil Shaham and Itzhak Perlman during concerts and recording sessions with the Pittsburgh Symphony Orchestra under conductors Lorin Maazel, John Williams, Mariss Jansons, Julius Rudel, David Del Tredici and Howard Shore.