Stefan MS, Pekow PS, Priya A, ZuWallack R, Spitzer KA, Lagu TC, Pack QR, Pinto-Plata VM, Mazor KM, Lindenauer PK. Association between Initiation of Pulmonary Rehabilitation and Rehospitalizations in Patients Hospitalized with Chronic Obstructive Pulmonary Disease. Am J Respir Crit Care Med. 2021 11 01; 204(9):1015-1023.