Cherubini, Antonio, Barbara Carrieri, and Paolo Marinelli. “Advantages and Disadvantages of Direct Oral Anticoagulants in Older Patients”. Geriatric Care 4, no. 1 (March 28, 2018). Accessed July 22, 2019. https://www.pagepressjournals.org/index.php/gc/article/view/7227.