[1] Univ Patras, Sch Med, Dept Cardiol, Queen Olgas Sq,7 Aratou St, Patras 26221, Achaia, Greece
[2] Queen Elizabeth Hosp, Dept Electrophysiol, Birmingham, W Midlands, England
[3] Univ Patras, Sch Med, Dept Publ Hlth, Patras, Greece
[4] St Andrews State Gen Hosp, Dept Cardiol, Patras, Achaia, Greece