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Hsu, Chih-Hsin, Cherylanne Glassner, Aimee J. Foreman, Richa Agarwal, Raymond J. Benza, Robert P. Frantz, and Mardi Gomberg-Maitland. “Treadmill testing improves survival prediction models in pulmonary arterial hypertension.” American Heart Journal 162, no. 6 (December 2011): 1011–17. https://doi.org/10.1016/j.ahj.2011.09.015.

Hsu C-H, Glassner C, Foreman AJ, Agarwal R, Benza RJ, Frantz RP, et al. Treadmill testing improves survival prediction models in pulmonary arterial hypertension. American Heart Journal. 2011 Dec;162(6):1011–7.

Hsu, Chih-Hsin, et al. “Treadmill testing improves survival prediction models in pulmonary arterial hypertension.” American Heart Journal, vol. 162, no. 6, Elsevier BV, Dec. 2011, pp. 1011–17. Crossref, doi:10.1016/j.ahj.2011.09.015.

Hsu C-H, Glassner C, Foreman AJ, Agarwal R, Benza RJ, Frantz RP, Gomberg-Maitland M. Treadmill testing improves survival prediction models in pulmonary arterial hypertension. American Heart Journal. Elsevier BV; 2011 Dec;162(6):1011–1017.