Guyatt, G. H., Akl, E. A., Crowther, M., Schünemann, H. J., Gutterman, D. D., & Zelman Lewis, S. (2012). Introduction to the Ninth Edition: Antithrombotic Therapy and Prevention of Thrombosis, 9th ed: American College of Chest Physicians Evidence-Based Clinical Practice Guidelines. American College of Chest Physicians.

Guyatt, Gordon H., Elie A. Akl, Mark Crowther, Holger J. Schünemann, David D. Gutterman, e Sandra Zelman Lewis. Introduction to the Ninth Edition: Antithrombotic Therapy and Prevention of Thrombosis, 9th Ed: American College of Chest Physicians Evidence-Based Clinical Practice Guidelines. American College of Chest Physicians, 2012.

Guyatt, Gordon H., et al. Introduction to the Ninth Edition: Antithrombotic Therapy and Prevention of Thrombosis, 9th Ed: American College of Chest Physicians Evidence-Based Clinical Practice Guidelines. American College of Chest Physicians, 2012.