Yasuo Kitamura, Mitsuo Otsuka, Gen Yamada, Satoshi Yuda, Keiki Yokoo, Kimiyuki Ikeda, Koji Kuronuma, Hirofumi Chiba, Akiyoshi Hashimoto, and Hiroki Takahashi. “Serial Measurements of Tricuspid Regurgitation Pressure Gradient by Echocardiography Predict Prognosis in Idiopathic Pulmonary Fibrosis”. Pulmonary Research and Respiratory Medicine 3, no. 1 (April 20, 2016): 2–9. Accessed September 6, 2026. https://openventio.us/index.php/PRRM/article/view/2146.