Incorrect use of thromboprophylaxis for venous thromboembolism in medical and surgical patients: results of a multicentric, observational and cross-sectional study in Brazil - Deheinzelin, D.; Braga, A. L.; Martins, L. C.; Hernandez, A.; Yoshida, W. B.; Maffei, F.; Monachini, M.; Calderaro, D.; Campos Junior, W.; Sguizzatto, G. T.; Caramelli, B. (Journal of Thrombosis and Haemostasis, 2006)