Ventetuolo Corey E, Kawut Steven M
Dept of Medicine, Alpert Medical School of Brown University, Providence, RI, USA Dept of Health Services, Policy and Practice, Alpert Medical School of Brown University, Providence, RI, USA.
Center for Clinical Epidemiology and Biostatistics, Perelman School of Medicine at the University of Pennsylvania, Philadelphia, PA, USA Dept of Medicine, Perelman School of Medicine at the University of Pennsylvania, Philadelphia, PA, USA.
Eur Respir J. 2015 Mar;45(3):853-4. doi: 10.1183/09031936.00191314.