APA (7th ed.) Citation

IM, L. (2004). Chronic thromboembolic pulmonary hypertension -- not so rare after all. New England Journal of Medicine, 350(22), 2236.

Chicago Style (17th ed.) Citation

IM, Lang. "Chronic Thromboembolic Pulmonary Hypertension -- Not so Rare After All." New England Journal of Medicine 350, no. 22 (2004): 2236.

MLA (9th ed.) Citation

IM, Lang. "Chronic Thromboembolic Pulmonary Hypertension -- Not so Rare After All." New England Journal of Medicine, vol. 350, no. 22, 2004, p. 2236.