[1] Univ Sao Paulo, Fac Med, Hosp Clin, Inst Coracao,Dept Cardiovasc Surg, Av Dr Eneas Carvalho de Aguiar 44, BR-05403900 Sao Paulo, SP, Brazil
[2] Univ Sao Paulo, Fac Med, Hosp Clin, Inst Coracao,Dept Cardiol, Sao Paulo, SP, Brazil
[3] Fac Med Marilia, Marilia, SP, Brazil
[4] Univ Sao Paulo, Fac Med, Hosp Clin, Inst Coracao,Dept Intervent Cardiol, Sao Paulo, SP, Brazil
[5] Univ Hosp Cleveland, Harrington Heart & Vasc Inst, Dept Cardiovasc Med, Med Ctr, Cleveland, OH 44106 USA