Response to: Implication of Ivabradine in Patients with Acute Heart Failure and Sinus Tachycardia Following Allogeneic Hematopoietic Cell Transplantation
1 Department of Neurology, Hematology, Diabetology, Endocrinology, and Metabolism (3rd Department of Internal Medicine), Faculty of Medicine, Yamagata University, Japan.
2 1st Department of Internal Medicine, Faculty of Medicine, Yamagata University, Japan.