Nobuhiro Ooba, Ayaka Sente, Megumi Abe, Fumiyuki Watanabe, Daisuke Tsutsumi, Kiminobu Nakamura, Toshimitsu Nakayama, Koichi Kimura, Noriyasu Fukuoka. Frequency of Clinical Monitoring of Serum Concentrations of Digoxin, Potassium, and Creatinine, and Recording of Electrocardiograms in Digoxin-Treated Patients: A Japanese Claims Database Analysis. Biological and Pharmaceutical Bulletin. 2020