Table 1.

Clinical trials in examining the safety and efficacy of inhaled CO^{54, 60-63}

Sponsor	Start Date	Subject	Phase	Status
Brigham and Women's Hospital	July 2011	Effect of inhaled carbon monoxide in treating idiopathic pulmonary fibrosis	2	Ongoing
University of Illinois at Chicago	July 2012	Carbon monoxide for the treatment of severe pulmonary arterial hypertension	1 2	Ongoing
NIH Clinical Center	October 2004	Prevention effect of carbon monoxide in lung inflammation	1	Completed
INO Therapeutics	August 2007	Safety and tolerability study of inhaled carbon monoxide in kidney transplant patients	2	Withdrawn
Weill Medical College of Cornell University	April 2015	Safety study of inhaled carbon monoxide to treat acute respiratory distress syndrome	1	Recruiting