[1] Queens Univ, Kingston Gen Hosp, Dept Cardiol, Kingston, ON, Canada
[2] Eskisehir Osmangazi Univ, Fac Med, Dept Cardiol, Eskisehir, Turkey
[3] Univ Calgary, Libin Cardiovasc Inst Alberta, Calgary, AB, Canada
[4] Queens Univ, Kingston Gen Hosp, Electrophysiol & Pacing, Kingston, ON K7L 2V7, Canada