Budhiraja Rohit, Tuder Rubin M, Hassoun Paul M
Division of Pulmonary, Critical Care, and Sleep Medicine, Department of Medicine, Tufts-New England Medical Center, Tufts University School of Medicine, Boston, Mass, USA.
Circulation. 2004 Jan 20;109(2):159-65. doi: 10.1161/01.CIR.0000102381.57477.50.