[1] Univ Sao Paulo, Fac Med, Inst Canc Estado Sao Paulo, Endovasc & Vasc Surg, Sao Paulo, Brazil
[2] Univ Sao Paulo, Fac Med, Hosp Clin,Spine Surg Div, Inst Ortopedia & Traumatol,Spinal Tumors, Sao Paulo, Brazil
[3] Univ Sao Paulo, Fac Med, Hosp Clin,Spine Surg Div, Inst Ortopedia & Traumatol,Lab Med Invest, Sao Paulo, Brazil
[4] Univ Sao Paulo, Fac Med, Vasc Surg, Sao Paulo, Brazil
[5] Hosp Israelita Albert Einstein, Sao Paulo, Brazil
[6] Univ Sao Paulo, Fac Med, Dept Vasc Surg, Sao Paulo, Brazil