1Autoimmune Lung Center and Interstitial Lung Disease Program, National Jewish Health, Denver, CO, USA, E-mail: swigrisj@njc.org
2Division of Pulmonary, Critical Care and Sleep Medicine, Sleep & Behavioral Health Sciences Section, National Jewish Health, Denver, CO, USA, E-mail: swigrisj@njc.org
3Participation Program for Pulmonary Fibrosis (P3F), National Jewish Health; Denver, CO, USA, E-mail: swigrisj@njc.org
4Exempla Lutheran Medical Center, National Jewish Health, Denver, CO, USA, E-mail: swigrisj@njc.org