McCurdy Michael T, Liew-Spilger Alyson, Walsh Mark
Division of Pulmonary and Critical Care Medicine, University of Maryland School of Medicine, Baltimore.
Department of Medical Education, Memorial Hospital of South Bend, South Bend, Indiana.
JAMA. 2015 May 26;313(20):2077-8. doi: 10.1001/jama.2015.4421.