ETHEL violinist Mary Rowell is leaving the ensemble she co-founded 13 years ago. She is retiring because of a heart condition, and will be replaced by Jennifer Choi, a former member of the Miró Quartet.

Since its formation in 1998, ETHEL has performed more than 100 commissioned works in 11 countries. Rowell referred to the stresses of a travel-heavy international career in a statement explaining her decision to step down: 'Given ETHEL's projected touring schedule, I find myself a victim of our success.'