[1] Cumhuriyet Univ, Sch Med, Dept Cardiovasc Surg, TR-58140 Sivas, Turkey
[2] Ordu State Hosp, Dept Cardiovasc Surg, Ordu, Turkey
[3] Cag Hosp, Dept Cardiovasc Surg, Ankara, Turkey
[4] Cumhuriyet Univ, Sch Med, Dept Microbiol & Clin Microbiol, TR-58140 Sivas, Turkey
[5] Cumhuriyet Univ, Sch Med, Dept Cardiol, TR-58140 Sivas, Turkey