Contribution of myocardial layers of right ventricular free wall to right ventricular function in pulmonary hypertension: Analysis using multilayer longitudinal strain by two-dimensional speckle-tracking echocardiography. (15th July 2016) - Ozawa, Koya; Funabashi, Nobusada; Tanabe, Nobuhiro; Tatsumi, Koichiro; Kobayashi, Yoshio