Haessler S, Guo N, Deshpande A, Zilberberg MD, Lagu T, Lindenauer PK, Imrey PB, Rothberg MB. Etiology, Treatments, and Outcomes of Patients With Severe Community-Acquired Pneumonia in a Large U.S. Sample. Crit Care Med. 2022 07 01; 50(7):1063-1071.