1. Department of Cardiovascular Surgery, University Hospital of the Federal University of Maranhão/HU-UFMA, São Luís, Maranhão, Brazil
2. Department of Thoracic Surgery, University Hospital of the Federal University of Maranhão/HU-UFMA, São Luís, Maranhão, Brazil
3. CEO Cardiostart International, Eugene, OR
4. Federal University of Maranhão, São Luís, Brazil