1 Department of Cardiology, Keio University School of Medicine, Tokyo, Japan.
2 Department of Cardiology, Keio University School of Medicine, Tokyo, Japan. Electronic address: kohno.a2@keio.jp.
3 Department of Pulmonary Medicine, Keio University School of Medicine, Tokyo, Japan.
4 Department of Pulmonary Medicine, Keio University School of Medicine, Tokyo, Japan; Department of Laboratory Medicine, Keio University School of Medicine, Tokyo, Japan.