[1] Natl Jewish Hlth, Autoimmune Lung Ctr, Denver, CO 80206 USA
[2] Natl Jewish Hlth, Interstitial Lung Dis Program, Denver, CO 80206 USA
[3] Univ Colorado, Colorado Hlth Outcomes Program, Denver, CO 80202 USA
[4] Univ Colorado, COPD Program, Denver, CO 80202 USA
[5] Univ Colorado, Div Psychosocial Med, Denver, CO 80202 USA