1. Thrombosis and Haemostasis Unit, Hematology and Hemotherapy Center; University of Campinas, Rua Carlos Chagas, 480. Cidade Universitária “ZeferinoVaz” CEP: 13083-970; Campinas SP Brazil
2. Discipline of Hematology and Hemotherapy, Department of Internal Medicine, Faculty of Medical Sciences; University of Campinas, Campinas, Brazil RuaTessália Vieira de Camargo, 126. Cidade Universitária “Zeferino Vaz” CEP: 13083-887; Campinas SP Brazil
3. Department of Clinical Pathology, Faculty of Medical Sciences; University of Campinas, Campinas, Brazil RuaTessália Vieira de Camargo, 126. CidadeUniversitária “ZeferinoVaz” CEP: 13083-887; Campinas SP Brazil