title: We should pay more attention to renal function before initiation of warfarin therapy.
authors.affiliation: Department of Cardiology and Clinical Examination, Faculty of Medicine, Oita University, Yufu, Japan. Electronic address: takanoriyamaguch@oita-u.ac.jp.
authors.forename: Takanori
authors.initials: T
authors.lastname: Yamaguchi
authors.affiliation: Department of Cardiology and Clinical Examination, Faculty of Medicine, Oita University, Yufu, Japan.
authors.forename: Naohiko
authors.initials: N
authors.lastname: Takahashi
keywords: Genotype; Renal impairment; Warfarin