[1] Univ Pittsburgh, Dorothy P & Richard P Simmons Ctr Interstitial Lu, UPMC, Pittsburgh, PA USA
[2] Univ Pittsburgh, Div Pulm Allergy & Crit Care Med, Pittsburgh, PA USA
[3] Univ Pittsburgh, Sch Nursing, Pittsburgh, PA 15261 USA
[4] Univ Pittsburgh, Dept Biomed Informat, Sch Med, Pittsburgh, PA 15261 USA
[5] Yale Univ, Sch Med, New Haven, CT USA