[1] Brown Univ, Sch Med, Providence VA Med Ctr, Providence, RI 02912 USA
[2] Albert Einstein Coll Med, Alice Lawrence Ctr Hlth & Rehabil, Beth Israel Med Ctr, Petrie Div, New York, NY USA
[3] Yale Univ, Sch Med, Sect Pulm & Crit Care, West Haven, CT 06516 USA
[4] VA Connecticut Healthcare Syst, West Haven, CT USA
[5] McGill Univ, Div Resp, Dept Med, Montreal Chest Inst,MUHC, Montreal, PQ, Canada
[6] Drexel Univ, Sch Med, Allegheny Gen Hosp, Lifeline Specialty Ctr, Pittsburgh, PA USA
[7] Univ Calif Los Angeles, Sch Med, Los Angeles Biomed Res Inst, Harbor UCLA Med Ctr, Torrance, CA 90509 USA
[8] Tufts Univ, Sch Med, Caritas St Elizabeths Med Ctr, Boston, MA 02111 USA
[9] Univ S Florida, Bay Pines, FL USA
[10] Duke Ctr Living, Durham, NC USA
[11] Italian Interdisciplinary Assoc Res Resp Dis, Multidisciplinary & Rehabil Outpatient Clin, Borgomanero, Italy
[12] St Josephs Hosp, Phoenix, AZ USA
[13] Seton Pulm & Cardiac Rehabil, Daly City, CA USA
[14] Univ Calif San Francisco, San Francisco, CA 94143 USA
[15] Univ Toronto, W Pk Healthcare Ctr, Toronto, ON, Canada
[16] Univ Connecticut, Sch Med, Farmington, CT USA
[17] Univ Colorado, Coll Nursing, Denver, CO 80202 USA
[18] Univ Colorado, Sch Med, Div Pulm Sci & Crit Care Med, Denver, CO USA
[19] Univ Laval, Ctr Pneumol, Hosp Laval, Quebec City, PQ, Canada
[20] Univ Kentucky, Med Ctr, Lexington, KY 40506 USA
[21] Univ Leicester, Dept Resp Med Allergy & Thorac Surg, Glenfield Hosp, Univ Hosp Leicester, Leicester, Leics, England
[22] Univ Calif San Diego, San Diego, CA 92103 USA
[23] Univ Hosp Leuven, Div Resp, Louvain, Belgium
[24] Katholieke Univ Leuven, Dept Rehabil Sci, Louvain, Belgium
[25] Univ Connecticut, Sect Gen Internal Med & Ambulatory Serv, St Francis Hosp & Med Ctr, Hartford, CT 06105 USA
[26] Univ Connecticut, Sch Med, St Francis Hosp & Med Ctr, Hartford, CT 06105 USA