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Ohigashi, Hirokazu; Haraguchi, Go; Yoshikawa, Shunji; Sasaki, Takeshi; Kimura, Shigeki; Inagaki, Hiroshi; Hachiya, Hitoshi; Hirao, Kenzo; Isobe, Mitsuaki . (2010). Comparison of Biomarkers for Predicting Disease Severity and Long-Term Respiratory Prognosis in Patients With Acute Pulmonary Embolism. International Heart Journal, 51(6), 416–420. doi:10.1536/ihj.51.416 
An interview with Sci-Hub Founder Alexandra Elbakyan,Who exactly should pay for academic research