1 1 University of California San Francisco Pulmonary Rehabilitation and Sleep Disorders Center San Francisco, California.
2 2 Burke Medical Group White Plains, New York.
3 3 Montefiore Department of Physical Medicine and Rehabilitation Albert Einstein College of Medicine White Plains, New York.
4 5 National Association for Medical Directors of Respiratory Care Vienna, Virginia.
5 4 Rehabilitation Clinical Trials Center Los Angeles Biomedical Research Institute at Harbor-University of California at Los Angeles Medical Center Torrance, California and.