1. University of South Florida College of Nursing, Tampa, Florida.
2. University of Pittsburgh School of Nursing, Pittsburgh, Pennsylvania.
3. Division of Pulmonary, Allergy and Critical Care Medicine, University of Pittsburgh, Pittsburgh, Pennsylvania.
4. The University of Pittsburgh Dorothy P. and Richard P. Simmons Center for Interstitial Lung Disease at UPMC, Pittsburgh, Pennsylvania.
5. Department of Medicine, University of Pittsburgh, Pittsburgh, Pennsylvania.